refraction of light

when light travels from a rarer to a denser medium, it -

• moves away from the normal

• moves towards the normal

• is undeviated

• retraces it path

if an object in air is viewed from beneath the sun of water below where does the object appear to be?

• the object appears above its two position

• the object appears exactly as it's true position

• the object appears below its true position

• the object cannot be viewed from beneath the waters surface

 

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

• always travels in a straight line

• slows down when it passes through water.

• makes the water in the glass evaporate.

• reflects the pencil on the water's surface.

The velocity of light in vacuum is _______ m/s

• 3x10^8

• 3x10^12

• 3x10^6

• 3x10^10

What is the difference between reflection and refraction? 

• Both involve light bending through a medium

• Reflection is light bending through a medium's surface and refraction is light bouncing off a medium

• Refraction is light being absorbed in a medium and reflection is light being bent through a different medium

• Reflection is light bouncing off a medium's surface and refraction is light bending through a medium

Light has the lowest speed in which medium? n shows density.

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