Physics unit 6

If you look directly into a mirror that is facing you 10 feet away, how far away does your virtual image appear to be standing?

10ft

The refraction of sunlight through Earth's atmosphere causes our days to appear [1] minutes longer.

5

Under which set of conditions will you likely see a rainbow?

A cloud of rain droplets is on one side of you while the rising or setting sun is on the other

Which of the following is considered iridescent a soap bubble a rainbow a compact disc a peacock feather a diamond

A compact disc peacock feathers

In 1801, Thomas Young shined monochromatic light through ________ and produced an interference pattern to demonstrate that light is a type of wave.

A pair of narrow slits

In which of these situation can we predict very little refraction?

A wave passes from one medium into a different medium where it moves with almost the same speed

Diffuse reflection will occur whenever

A wave strikes a rough surface

Through a vacuum

All colors of light travel the same speed

What is the difference between an echo and a reverberation?

An echo is one reflection, and a reverberation is many reflections

Waves with long wavelengths will ________ obstacles.

BEnd quickly around

Why is the ocean colored blue-green?

Because water absorbs red light to a greater extent than other colors

Compared to your reflection in a straight, plane mirror, your reflection in a curved mirror can appear

Bigger or smaller

What's the color yellow complementary to

Blue

Which of the following explains a way in which reflection and refraction are similar?

Both occur at the boundary between two media

Refraction will occur whenever a wave

Changes speed

A mixture of blue and green light will produce

Cyan

What's the color red complementary too

Cyan

Which of these tasks would a spectroscope be most helpful for?

Identifying the element in a substance

Diffraction ________ radio reception and ________ microscope resolution.

Improves worsens

Light from an ordinary lamp is considered incoherent or coherent

Incoherent

light from a laser is considered coherent or incoherent

Incoherent

If a waves energy is not totally reflected at a medium boundary, what happens to the remainder?

It is transmitted into the new medium

White is not a real color because

It's a combination of all colors

Black is not a real color because

It's the absence of light

When a tuning fork vibrates it emits sound . When an electron vibrates it emits

Light

A wave will reflect when it passes from one medium into another. This holds true for

Light waves and sound waves

A mixture of red and blue light will produce

Magenta

What's the color green complementary too

Magenta

Which colors are the subtractive primary colors?

Magenta cyan yellow

Can light of different colors stay in phase with one another?

No, different colors have different wavelengths and can never perfectly overlap

Which kinds of waves reflect smoothly from a wire-mesh dish? Which kinds of waves reflect diffusely from a wire-mesh dish?

Radio waves, visible light waves

Which colors are the additive primary colors?

Red green blue

Which of the following correctly orders the colors in a spectrum?

Red orange yellow green blue violet

Which of the following explains a way in which reflection and refraction are different?

Reflected waves remain in one medium, refracted waves pass into a different medium

The concept of a mirage has most to do with

Refraction

Which of the following are involved in the phenomenon of iridescence? Relation reflection defraction interference

Refraction reflection interference

Materials are more likely to be reflective if they are

Smooth and rigid to light

Reflection occurs when a wave encounters

The boundary between one medium and another medium

During the daytime, the sky is blue. At sunset, the sky becomes more red. What changes each day to produce this difference in color?

The distance of the path light takes through the atmosphere to reach your eyes

An interferometer is used to measure

The wavelength of light

Light travels through a curved optical fiber

Through a series of straight line pathways

Which of the following correctly orders colors from most scattered to least scattered in Earth's atmosphere?

Violet blue red

A mixture of red and green light will produce

Yellow

Which colors of light are human eyes most sensitive to?

Yellow green

The spectrum produced by a prism or raindrop is evidence that the average speed of light in a material depends on the light's

color

When a wave passes through an opening, some of the wave is bent. This phenomenon is called ________.

diffraction

Huygen's principle states that ________.

each point on a wave front acts as a new source of wavelets

Diffuse reflection occurs when the size of surface irregularities

large compared to the wavelength of the light used

In order for iridescence to occur, light must be shined onto

many layers of transparent or semi-transparent materials

The average speed of light is greatest in

red glass

According to the law of reflection

the angle of reflection from a mirror equals the angle of incidence

Two people stare down at a puddle on the street covered in a thin layer of gasoline and a thin layer of water. The pattern of light that reaches one person's eyes constructively interferes and destructively interferes in a way that is slightly different from the light that reaches the other's eyes. As a result ________.

the two people will see different color patterns in the puddle