10 P.S QUIZ 5 (REFRACTION AT PLANE SURFACE - 1)By PRABHAKAR

The velocity of light in vacuum is _______ m/s

• 3x10⁸
• 3x10¹²
• 3x10⁶
• 3x10¹⁰

Absolute refractive index of any medium is always _______.

• less than 1
• greater than 1
• 1
• 0

The formula to calculate the refractive index is

• n=cv
• n=v/c
• n=c/v
• v=nc

Light travels through a liquid at 2.25 x10⁸ m/s. What is the refractive index of the liquid?

• 1.33

• 1.0

• 1.523

• 2.45

Light has the lowest velocity in which medium?
flint glass n=1.70
barium glass n=1.60
crown glass n=1.523
water n=1.33
diamond n=2.45

• diamond
• water
• flint glass
• barium glass

A ray of light travels from air into a glass block.

Which diagram correctly shows the path of the ray through the glass block?

• A

• B

• C

• D

When light passes from one medium into another in which its speed is lower, then

• it is bent towards the normal.

• it always lies along the normal.

• it is unaffected.

• it is bent away from the normal.

How the charecteristics of light affected by an increase in the refractive index of the medium?

• Its frequency increases

• Its frequency decreases

• Its speed increases

• Its speed decreases

Which of the following factors change during the refraction of light ?

• Frequency only

• Wavelength only

• Speed and frequency

• Wavelength and speed

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