Refraction of Light

Which of the following factors change when light refracts?

• Frequency only

• Wavelength only

• Speed and frequency

• Wavelength and speed

A straight glass rod appears to bend when placed in a beaker of water, as shown in the diagram below. What is the best explanation for this phenomenon?

• The water is warmer than the air

• Light travels faster in water than in air

• Light is reflected at the air-water interface

• Light is refracted as it crosses the air-water

  interface

What happens to the speed and frequency of a light ray when it passes from air into water?

• The speed decreases and the frequency increases

• The speed decreases and the frequency remains the same

• The speed increases and the frequency increases

• The speed increases and the frequency remains the same

A ray of red light from a laser passes into a semi- circular glass block.What is shown at M?

• Dispersion

• Rarefaction

• Reflection

• Refraction

Light passes into a glass block. Which is the angle of refraction?

• A

• B

• C

• D

Which of the following is true regarding the index of refraction of a substance?

• n=c/v

• n=v/c

• n=cv

• n=c+v

Which quantity is equivalent to the product of the absolute index of refraction of water and the speed of light in water?

• wavelength of light in a vacuum

• frequency of light in water

• sine of the angle of incidence

• speed of light in a vacuum

The diagram below shows a ray of monochromatic light incident on a boundary between air and glass. Which of the letters represent the path after it strikes the glass?

• A

• B

• C

• D

If the index of refraction of a certain material is n = 2, the speed of light in this material is ________.

• 6.7 × 10⁷

• 1.5 × 10⁸

• 3.0× 10⁸

• 6.0 × 10⁸

The speed of light in a piece of plastic is 2.00 × 10⁸ m/s. What is the absolute index of refraction of this plastic?

• 0.67

• 1.0

• 1.33

• 1.5