refraction AJNNT

A student placed a pencil in a cup of water. The pencil appears broken because light

• always travels in a straight line.

• bends when it passes through water.

• makes the water in the glass evaporate.

• reflects the pencil on the water's surface.

Tags

NGSS.MS-PS4-2

The velocity of light in vacuum is _______ m/s

• 3x10⁸
• 3x10¹²
• 3x10⁶
• 3x10¹⁰

Tags

NGSS.HS-PS4-1

Absolute refractive index of any medium is always _______.

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

Glass has a _____________ index of refraction than air.

• Equal
• Greater
• Less
• Impossible to say

Tags

NGSS.MS-PS4-2

Light travels through a liquid at 2.25 x10 ⁸ m/s. What is the index of the liquid?

• 1.33

• 1.0

• 1.523

• 2.45

What is the index of refraction of a refractive liquid if the angle of incidence in the air is 35 degrees and the angle of refraction is 14 degrees?

• 1.33
• 2.21
• 2.37
• 1.72

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

Tags

NGSS.HS-PS4-1

If a pulse of red light and a pulse of blue light travel in vacuum

• The red pulse travels faster because its index of refraction is smaller
• The blue pulse travels faster
• The two pulses travel at the same speed
• The relative speed depends on the exact wavelengths of the red and blue pulses

Tags

NGSS.HS-PS4-1

A ray of light traveling from air into crown glass strikes the surface at an angle of 30 degrees. What is the angle of refraction? (air n=1, crown glass n=1.532)

• 39.7 degrees
• 19.2 degrees
• 59.1 degrees
• 12.3 degrees

Light travels from glass (n=1.66) to water, what is the critical angle for these two mediums?

• 53.2

• 48.8

• 37

• not possible