1. What are some ways in which materials affect how light is transmitted?

3. In order for an object to appear white, which wave lengths must the light contain and the object reflect?

4. If you are a firefighter searching a smokefilled apartment. Would you want to use a stronger ligt to help you see better? Why or Why not.

6.If you focus a red light, a green light, and a blue light on the same part of a black curtain, what color will the curtain appear to be? Why?

Answer:

You have read that EM waves can interact with a material medium in

the same ways that mechanical waves do. Three forms of interaction

play an especially important role in how people see light. One form is

reflection. Most things are visible because they reflect light. The two

other forms of interaction are transmission and absorption.

(trans-MIHSH-uhn) is the passage of an EM wave

through a medium. If the light reflected from objects did not pass

through the air, windows, or most of the eye, we could not see the

objects. (uhb-SAWRP-shun) is the disappearance of an

EM wave into the medium. Absorption affects how things look, because

it limits the light available to be reflected or transmitted.

Explanation:

Transparent (trans-PAIR-uhnt) materials allow most of the light

that strikes them to pass through. It is possible to see objects

through a transparent material. Air, water, and clear glass are transparent. Transparent materials are used for items such as windows,

light bulbs, thermometers, sandwich bags, and clock faces.

Translucent (trans-LOO-suhnt) materials transmit some light, but

they also cause it to spread out in all directions. You can see light

through translucent materials, but you cannot see objects clearly

through them. Some examples are lampshades, frosted light bulbs,

frosted windows, sheer fabrics, and notepaper.

Opaque (oh-PAYK) materials do not allow any light to pass

through them, because they reflect light, absorb light, or both.

Heavy fabrics, construction paper, and ceramic mugs are opaque.

Shiny materials may be opaque mainly because they reflect light.

Other materials, such as wood and rock, are opaque mainly

because they absorb light.

1. Transmission of Light

Some materials have a low light-absorption rate this means that they are excellent at light transmission. Some of those materials are water, air, and glass. Note that their common quality is transparency.

When light waves go through the boundary between different matter, they are said to be transmitted. When some of the light that travels through that object is partially absorbed, the material is said to be translucent. Examples of translucent objects are curtains, window blinds, colored glass, lampshades, etc.

In pure physics terms, when vibrations of electrons are transported onto neighboring atoms on the other side of the object, such vibrations or frequencies of light have been transmitted, and that object that carries out the transportation is said to be transparent.

If however, at the surface of the material the electrons are reemitted after a short period of vibration, then the light wave is said to have been reflected. Objects which do not absorb but reflect light are said to be opaque. Examples of opaque objects are silver and gold.

All black surfaces absorb light.

2. Light Spectrum:

If an object appears white, it means that all the visible wavelengths of light that shine on it are reflected back.

3. Light for Navigating Smoky terrain:

The best forms of light for navigating a fire and smoke situation are Red LEDs, Infrared, and Thermal Imaging.

Stronger lights cannot necessarily cut through smoke because smoke contains so many suspended particles and or matter. These particles absorb most of the light making it difficult to see through them.

Firefighters and Military personnel use special devices called Foward-Looking Infrared Radiation (FLIC) which is able to identify infrared radiations emitted from a heat source and produces a live feed video output.

For more about the physics of light, click here:

https://brainly.com/question/18704022

Who does Sabato suggest is responsible for political problems in the United States? *

A.public-spirited citizens
B.millionaires
C.Founders of the United States
D.Republicans and Democrats

PLS HELP ASAP :((

What does Thomas Paine argue in his pamphlet, Common Sense?

That Britain has been very fair with the colonies
That the colonies should break away from British rule
That the colonies should remain loyal to Britain
That King George III should visit the colonies

I do think the answer is A.

(True or False) All congressmen will be up for election in 2021.

"How did delegates change Jefferson’s original draft of the Declaration?"

A) They added a passage freeing slaves.

B) They deleted all passages that criticized King George.

C) They deleted a passage that blamed King George for the slave trade.

D) They added the phrase “execrable commerce” to a passage about the slave trade.


I put quotes in the question cuz I read the Honor Code.

Write a letter as if you are Adam Smith to Karl Marx, or Karl Marx to Adam Smith. Explain your ideas on economics (capitalism vs. socialism) and why they are better. Your response should be in a letter format, including a greeting, body, and farewell. It must contain at least one paragraph. See pages 446-450 and 483-486.

PLEASE HELP!! I'll give 50 points just pleaseeee help!!

what was an important impact of the french and indian war

why was the territory of texas annexed but the us

If you took the test say what answer it was

Choose the best personal connection you could make to the passage you just read.

I know how to take tests, so I like to hear about how other countries scored.
I am a student, so I care about the scores of students in other countries.
I am a student, so the decision to make the school year longer would affect me.
I know that students in other countries have to go to school.

Mercantilism motivated Britain to colonize North America because the British believed that colonies would help the British economy. Which of the following was NOT an aspect of British mercantilist policies

a) the desire to convert American Indians to Catholicism

b) the desire to gain natural resources in the New World

c) the desire to challenge Spanish power in the Americas

d) the desire to give better lives to poor English citizens

Based on Isaac Newton
pls help

What did the Democrats gain from the Louisiana State Constitution of 1845?

abolition of slavery
more representation for business owners
government aid for businesses
universal manhood suffrage

I dont think the answer is B.

Which of the following was an effect of new advancements in transportation?
O quicker transport time
O larger quantities of product transported
O new trade routes established
O all of the above

What ethnic groups came to the middle colonies? How did they help improve farming?

When Ryan was born, he weighed 7 pounds.At 6 months, he weighed 11.2 pounds. Amanda weighed 6 pounds when she was born, and 12.9 pounds at 6 months. Which baby had a greater percent increase in weight? Explain.
PLEASE HURRY FIRST ONE TO ANSWER GETS BRAINLEIST

How did the Compromise of 1850 change the political map of Texas?
Texas became two states.
A portion of land in Texas became part of New Mexico.
Texas became a slave state,
A portion of California was added to Texas.

What effect did the Diaspora have on the religion of Judaism?

Who likes to collect old things. I know that i love to collect old things especially old cars.
God bless all! :)

According to Crevecoeur, what happened in the “New World” that didn’t happen in Europe? Why?

if you answer with random letters or things to get points, you will be reported.

"Third Parties" are MOST successful in __

A. playing the role of "spoiler" in major elections
B. getting candidates elected governors of states
C. getting issues to be recognized by major parties
D. preventing controversial legislation from becoming law

need answer fast!

If you commit a crime, which part of the 5th amendment protects you from not being told what you have been arrested for or being told that your court date is in 10 years?
A) Self-incrimination
B) Due Process
C) Freedom of Speech
D) Eminent Domain

WILL MARK BRAINLIST!!!
Can you complete the graph but in a way a 7th grader would write it? Thank you so much it will help a lot!

The Roman Empire fell around the fifth century, and as Islam spread in the seventh century, trade between Europe and China slowed. Chinese traders were blocked from westward expansion into Europe when the Chinese army was defeated by Muslim fighters in the area known as Syr Darya. The trade routes, known as the Silk Road, fell into disuse, and trade between the Far East and Europe nearly stopped. It wasn't until the thirteenth century when the Mongols invaded and controlled central Asia and large parts of the Middle East that extensive trade along these routes was opened again.

Which statement is true about the Mongol empire?
A.
Without access to European markets, the Chinese were unable to obtain raw materials.
B.
The Mongols unified regions along the Silk Road, allowing for safe transport of goods.
C.
Muslims controlled busy trade routes into China from the fifth to the seventh centuries.

What country is located directly to the east of Germany?


Belgium

France

Italy

Poland

Which of the following is a path for transportation built by a private company that charges
users a fee or toll?
O locomotive
O railroad
O turnpike
O waterway

Roger Bannister: The Barrier Breaker


Introduction
How do you overcome obstacles that seem impossible? Sir Roger Bannister, the first man to break the four-minute-mile record, knew what it was like to break barriers.

Learning a Passion
Roger Bannister was born in Harrow, England, in 1929. Since his parents couldn't afford to send him to college, he worked to win scholarships to study medicine at Oxford. Bannister had two loves: studying medicine and running track. He worked hard to do well at both. Because of his studies, Bannister had less time for track practice than other athletes. Most athletes trained at least six days a week. Bannister trained only two to three times a week. In the 1952 Olympic Games, Bannister ran the 1500m race but finished fourth. Many said this was due to his lack of training. Bannister decided it was time to get serious. He focused on doing what everyone in the world thought was impossible. He wanted to break the four-minute-mile barrier.

Setting a Goal
No one in history had ever run a mile in less than four minutes, although several had tried. For decades, physicians believed that running a mile too fast would cause heart failure. Bannister knew he could set a new world record by working hard. Bannister believed that pushing himself beyond the pain would make him a winner. That is just what Bannister did on May 6, 1954, at Iffley Road Track in Oxford. On a cold, wet track, Roger Bannister broke the four-minute-mile barrier with a time of 3:59.4. Two other runners helped him set a fast pace. Then Bannister relied on his training to run the first three laps of the track in 3:01. During the final lap of the race against the clock, Bannister knew he could finish the race in less than 59 seconds. He broke away from the other runners and flew down the last two curves of the track at record speed. As he crossed the finish line, he collapsed into the arms of his friend Reverend Nicholas Stacey. Bannister was out of breath and out of energy, but he knew he had broken the world record. Bannister accomplished a great moment in history that day.
After breaking the four-minute-mile barrier, Bannister competed in a few more races. He ran his personal record of 3:43.8 in the 1500m in the European Championship. That was Bannister's last race. In August of 1954, he retired at the age of 25 to focus on what he considered his true contribution to society—his research in the field of neurology, the study of the nerves and the nervous system.

Making a Difference
In 1975, two decades after his feat, Roger Bannister was knighted by the Sports Council of England. He had done what no man thought was possible. However, Bannister knew his athletic glory was fleeting. He felt that his work as a neurologist was the real accomplishment of his life. For over 40 years, he worked in neurology, helping patients who suffered serious neurological disorders. To honor his work and dedication as a neurologist, St. Mary's Hospital in London named a lecture hall after Dr. Bannister. In the lecture hall, the famous stopwatch used to time Bannister's mile is on display. In July of 2012, Bannister was honored to be elected as one of the Olympic torchbearers. He carried the flame into the Oxford track stadium that was named for him. Of his neurology career and his track achievements, as the greatest runner ever, Bannister claims that working hard is the secret to his success.


11
Why does the author use chronological order to organize the passage?
A.
to place the events in Bannister's life in the order in which they happened
B.
to present Bannister's challenge of breaking a record and his solution for it
C.
to compare Bannister's achievements in running with his achievements in medicine
D.
to show how the events in Bannister's life affected his career in neurology

i need help with this please help me!!!!

How are the colonies at Jamestown and Plymouth similar?

Settlers came to escape religious persecution.
Each was sponsored by the London Company.
They were founded by the same explorer.

Why did the Spanish settle in Georgia?

a) to grow exotic spices

b) to expand their empire

c) to learn from the natives

d) to stop French colonization