Waves test

Question 1

How do particles move in a wave?

Answer 1

Move back and forth

Question 2

What is the difference between a transverse and longitudinal wave?

Answer 2

A longitudinal wave moves side to side while a transverse wave move up and down

Question 3

What do all waves have in common?

Answer 3

refraction, and interference

Question 4

What is the difference between a crest and trough?

Answer 4

Crest is the highest point trough is the lowest point

Question 5

How is a crest and trough different for a longitudinal wave?

Answer 5

The crest of a wave is the highest point that it reaches, while the trough of the wave is the lowest point.

Question 6

How do you measure wavelength, frequency, and amplitude?

Answer 6

You measure wavelength in cm, frequency in Hz, and amplitude in volume

Question 7

How are frequency and wavelength related?

Answer 7

They are inversely related

Question 8

What is the shape of a grand piano? Why is it shaped that way? Use your understanding of waves to explain.

Answer 8

It is shaped as big on one side and going down it gets smaller. It is shaped this way because one the bigger side there are lower tones because the strings are longer meaning waves are bigger meaning the tone is lower while on the other side the strings are smaller meaning small wavelength high pitch

Question 9

What type of wave is sound and how do we know?

Answer 9

Longitudinal we know why because when a sound is played it goes straight to our ears meaning that it goes back and forth.

Question 10

How does changing wavelength, frequency, and amplitude affect a sound wave?

Answer 10

Changing the wavelength would result in the frequency either being higher or lower and the amplitude doesn’t affect wavelength but it affects the loudness

Question 11

What is the range of human hearing?

Answer 11

20-20,000 Hz

Question 12

What type of wave is light and how do we know?

Answer 12

It is a transverse wave and we know because when two polarizers are perpendicular to each other it blocks out all waves except transverse and when you try to shine a light through them nothing comes out the other side.

Question 13

How is light able to travel without a medium?

Answer 13

Light travel as an electromagnetic wave, and to travel it medium is not required.

Question 14

How does changing wavelength, frequency, and amplitude affect a light wave?

Answer 14

Changing the wavelength only affects the frequency bc when the wavelength is bigger the frequency/color will be dark and when the wavelength is smaller the frequency/color will be bright and the amplitude affect the brightness

Question 15

How are red and blue light different in terms of wavelength? Frequency?

Answer 15

the red light has a higher wavelength and a lower frequency and the blue light has a smaller wavelength and a higher frequency

Question 16

What is ultraviolet light? What is infrared? Which is more dangerous and why?

Answer 16

ultraviolet light is beyond violet and infrared in below red

Question 17

How does the eye work to see color? What are rods and cones?

Answer 17

it uses cones to see color and cones are what we use to see color we have 3 cones and rods are sensitive to amplitude

Question 18

What is the difference between color addition (with light) versus color subtraction (with pigments)?

Answer 18

Color addition uses out 3 primary colors we se and combines them and color subtraction reflect and absorb many colors

Question 20

What color would a lemon be under blue light? Under cyan light? Under magenta light?

Answer 20

it would absorb the blue and stay the same, it would reflect the green and absorb the blue, it would reflect the red and absorb the blue

Question 21

What is polarization?

Answer 21

when a wave is allowed through something

Question 22

What kind of waves can be polarized?

Answer 22

transverse

Question 23

What is the Doppler effect?

Answer 23

an apparent change in frequency of a wave when the source is in motion

Question 24

How does the Doppler effect work with sound? With light

Answer 24

with light it affects color and with sound it affects pitch

Question 25

What does the red shift tell us about the universe?

Answer 25

it tells us that galaxies are expanding and moving away

Question 26

What is interference?

Answer 26

when two waves interact

Question 27

What is constructive interference

Answer 27

an increase in amplitude when the crests/troughs line up

Question 28

What is destructive interference

Answer 28

a decrease in amplitude when the crests and troughs cancel each other out

Question 29

What kind of interference is a sonic boom? How does it happen?

Answer 29

it is constructive and it happens by the waves so squished that they end up on top of each other

Question 30

What is refraction?

Answer 30

bending of light due to change in the medium, which changes the speed and direction of the wave

Question 31

Why does refraction occur?

Answer 31

due to a change in the speed of the wave.

Question 32

Explain in detail why a penny in a cup of water can be seen before a penny in a cup without water.

Answer 32

The light from the penny bends into your eye letting you see from farther away

Question 33

How do mirages happen?

Answer 33

when light passes through two layers of air with different temperatures.

Question 34

Explain what is happening in the inverted American flag experiment in terms of how your eye works with color

Answer 34

all three of your cones are overworked so once the screen changed to a blank screen the cyan -> red, yellow -> blue, black -> white