Chapter 5 Ray Model of Light

The illustration shows a light ray striking an object.
In the illustration, the light ray striking the object is-

• absorbed
• stopped
• reflected
• refracted

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NGSS.MS-PS4-2

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

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NGSS.MS-PS4-2

Light has the highest 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

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NGSS.MS-PS4-2

Glass has a _____________ index of refraction than air.

• Equal
• Greater
• Less
• Impossible to say

How does light travel?

• Light travels in curves.

• Light travels in a straight line.

• Light does not travel.

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NGSS.MS-PS4-2

Which is the correct way to represent light?

• 
• 
• 
• 

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NGSS.MS-PS4-1

NGSS.MS-PS4-2

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

Angle between normal and the ray reaching the boundary is

• angle of refraction.

• angle of reflection

• angle of incident

• angle of incidence

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NGSS.MS-PS4-2

What is the incident ray?

• The ray travelling away from the mirror or object

• The angle at which the light hits the mirror

• The ray travelling towards the mirror or object

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NGSS.MS-PS4-2

What is the reflected ray?

• The ray travelling towards the mirror or object

• The ray travelling away from the mirror or object

• The angle that the light is reflected by the mirror

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NGSS.MS-PS4-2