REFRACTION OF LIGHT

Name the subjective property of light related to its wavelength.

• refractive index

• frequency

• colour

• velocity

Jyothi puts a pencil into a glass container having water and is surprised to see the pencil bend.Name the phenomenon responsible for the change.

• Reflection of light

• Refraction of light

• total internal reflection of light

• partial reflection and partial refraction

As the ray of light passes from air to glass, state how the wavelength of light changes.

• wavelength increases

• wavelength decreases

• wavelength remains constant

• wavelength decreases and then increases

A boy uses blue colour of light to find the refractive index of glass. He then repeats the experiment using red colour of light .How will the refractive index of glass be ?

• the same

• μ decreases

• μ increases

• same as speed of light

When a ray of light enters from one medium to another having different optical densities it bends. beacuse

• of different optical densities

• speed of light changes

• obstruction of light changes

• frequency of light changes

choose the conditions where light does not bend when entering a medium of different optical density,

• incident ray is normal to the refracting surface

• any obliquely incident ray

• angle of incidence is 90°

• angle of incidence is 0°

Which colour of light travels fastest in any medium except air ?

• yellow

• red

• violet

• white

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

The fact the two angles are the same is an example of....

• Refraction
• Angle of Incidence
• Law of reflection
• Magnification

The velocity of light in vacuum is _______ m/s.

• 3x10⁸
• 3x10¹²
• 3x10⁶
• 3x10¹⁰