Light

The reflection from rough surfaces is called

• Regular Reflection

• Irregular reflection

• Regular Refraction

• Irregular Refratcion

Rough surfaces reflect rays of light in

• One direction

• Two directions

• Many directions

• No direction

Which quantity does not change during refraction

• Direction

• Speed

• Wavelength

• Frequency

The refractive index of a medium is

• Speed of light in air to speed of light in vacuum

• Focal length

• None of them

• frequency of light in vacuum to frequency of light in air

The greater the value of refractive index of a medium, the bending of light will be

• Greater

• Smaller

• Zero

The measure of how much light refracts is called

• Refraction

• Law of reflection

• Reflected ray

• Index of refraction

Light bends in all materials at

• Same angle

• Different angles

• Nearly same angles

• Opposite angles

What happens to the speed of light in a more optically dense medium?

• it slows down

• it speeds up

• stays the same because all light travels at the speed of light

When will total internal reflection occur?

• When light travels from a less dense to a more dense medium

• When the angle of incidence is smaller than the critical angle

• When the angle of incidence is greater than the critical angle

• When the light cannot pass through a medium