Olivia Gibbs
Quiz by , created more than 1 year ago

11th grade Physics (Reflection and Refraction & Electrostatics) Quiz on Reflection and Refraction (Unit Evaluation), created by Olivia Gibbs on 31/03/2015.

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Olivia Gibbs
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Reflection and Refraction (Unit Evaluation)

Reflection and Refraction (Unit Evaluation)

Question 1 of 30

1

When a virtual image is created in a plane mirror

Select one of the following:

  • the image is upright.

  • the image is located behind the mirror.

  • reflected rays diverge.

  • ALL OF THE ABOVE

  • NONE OF THE ABOVE

Explanation

Question 2 of 30

1

An echo occurs when sound

Select one of the following:

  • is transmitted through a surface.

  • is reflected from a distant surface.

  • changes speed when it strikes a distant surface.

  • ALL OF THE ABOVE

  • NONE OF THE ABOVE

Explanation

Question 3 of 30

1

Diffuse reflection occurs when the size of surface irregularities

Select one of the following:

  • larger than 1 m in diameter.

  • large compared to the wavelength of the light used.

  • small compared to the wavelength of the light used.

  • larger than 1 cm in diameter.

  • NONE OF THE ABOVE

Explanation

Question 4 of 30

1

It is difficult to see the roadway from a car on a rainy night because the road surface

Select one of the following:

  • is obscured by the rain itself.

  • that is normally a diffuse reflector when dry becomes a mirror surface when wet.

  • absorbs the light more when wet.

  • scatters light in all directions.

Explanation

Question 5 of 30

1

Refraction is caused by

Select one of the following:

  • different wave speeds.

  • more than one reflection.

  • displaced images.

  • bending.

Explanation

Question 6 of 30

1

You can hear noises a long distance away over water at night because

Select one of the following:

  • of lowered temperature.

  • water conducts sound better at night.

  • sound is reflected off water more efficiently at night.

  • of refraction of sound in air.

Explanation

Question 7 of 30

1

The average speed of light is greatest in

Select one of the following:

  • orange glass.

  • blue glass.

  • red glass.

  • green glass.

  • IT IS THE SAME IN ALL OF THE ABOVE

Explanation

Question 8 of 30

1

A mirage can occur

Select one of the following:

  • when cooler air is above hotter air.

  • when there's a layer of hot air close to the ground.

  • on a hot day.

  • ALL OF THE ABOVE

  • NONE OF THE ABOVE

Explanation

Question 9 of 30

1

The critical angle for a light from the bottom of a swimming pool shining upward toward the pool's surface is the angle

Select one of the following:

  • where light is refracted so it just skims the pool surface.

  • 43 degrees.

  • at which all light is refracted out of the pool.

  • 42 degrees.

  • at which some light is reflected from the surface.

Explanation

Question 10 of 30

1

A person standing waist-deep in a swimming pool appears to have short legs because of light

Select one of the following:

  • refraction.

  • interference.

  • diffraction.

  • reflection.

  • absorption.

Explanation

Question 11 of 30

1

Different colors of light travel at different speeds in a transparent medium. In a vacuum, different colors of light travel at

Select one of the following:

  • the same speed.

  • different speeds.

Explanation

Question 12 of 30

1

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

Select one of the following:

  • transmission qualities.

  • col.or.

  • wave nature.

  • particle nature.

Explanation

Question 13 of 30

1

The shortest plane mirror in which you can see your entire image

Select one of the following:

  • is half your height.

  • is twice your height.

  • is equal to your height.

  • cannot be determined.

  • depends on how far the mirror is from you.

Explanation

Question 14 of 30

1

A beam of light travels fastest in

Select one of the following:

  • air.

  • water.

  • plastic.

  • glass.

  • ITS AVERAGE SPEED IS THE SAME IN EACH OF THE ABOVE

Explanation

Question 15 of 30

1

Which of the following is a consequence of the refraction of light?

Select one of the following:

  • rainbows

  • mirages

  • internal reflection

  • ALL OF THE ABOVE

  • NONE OF THE ABOVE

Explanation

Question 16 of 30

1

Stars twinkle when seen from Earth at night. When seen from the moon, stars

Select one of the following:

  • twinkle less.

  • twinkle more.

  • don't twinkle.

Explanation

Question 17 of 30

1

In a curved optical fiber, light

Select one of the following:

  • gains energy in each internal reflection.

  • internally reflects in a succession of straight-line paths.

  • bends and follows the curve of the fiber.

  • scatters in random directions from the fiber's inner surface.

Explanation

Question 18 of 30

1

A rainbow nicely illustrates an example of light

Select one of the following:

  • internal reflection.

  • refraction.

  • internal reflection and refraction.

  • neither internally reflecting nor refracting.

Explanation

Question 19 of 30

1

In a double rainbow, the outermost color in the outermost bow is

Select one of the following:

  • blue.

  • green.

  • red.

  • ANY OF THESE AT DIFFERENT TIMES

Explanation

Question 20 of 30

1

A secondary rainbow is dimmer than a primary rainbow because

Select one of the following:

  • only large drops produce secondary rainbows.

  • sunlight reaching it is less intense.

  • there is an extra reflection inside the water drops.

  • it is a reflection of the primary rainbow.

  • NONE OF THE ABOVE

Explanation

Question 21 of 30

1

When seen from an airplane, a rainbow sometimes forms a complete circle. When this happens, the plane's shadow is

Select one of the following:

  • in the center of the rainbow.

  • totally outside the rainbow.

  • in the upper part of the rainbow.

  • nowhere. There is no shadow.

  • in the lower part of the rainbow.

Explanation

Question 22 of 30

1

Ninety percent of light incident on a certain piece of glass passes through it. How much light passes through two pieces of this glass?

Select one of the following:

  • 81%

  • 85%

  • 89%

  • 90%

  • 80%

Explanation

Question 23 of 30

1

The law of reflection says that all light reaching a boundary between two surfaces is reflected.

Select one of the following:

  • True
  • False

Explanation

Question 24 of 30

1

When you look at the image of a candle in a plane mirror, you see a real image.

Select one of the following:

  • True
  • False

Explanation

Question 25 of 30

1

Diffuse reflection occurs when light is reflected in many directions from a rough surface.

Select one of the following:

  • True
  • False

Explanation

Question 26 of 30

1

Reflection occurs when one pat of a wave travels more slowly than another part.

Select one of the following:

  • True
  • False

Explanation

Question 27 of 30

1

The critical angle is the angle at which light just grazes the surface of a substance.

Select one of the following:

  • True
  • False

Explanation

Question 28 of 30

1

Total internal reflection occurs when a light ray hits a surface at an angle greater than the critical angle.

Select one of the following:

  • True
  • False

Explanation

Question 29 of 30

1

When a wave reaches a boundary between two media, in most cases some of the wave is reflected and some is refracted.

Select one of the following:

  • True
  • False

Explanation

Question 30 of 30

1

A line that represents the position of a wave crest is called a wave front.

Select one of the following:

  • True
  • False

Explanation

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