Reflection, Refraction and Colours of light

Objects that reflect well are

• Matte surfaces

• Smooth, shiny surfaces

• Dark coloured surfaces

• Medium coloured surfaces

The law of reflection states that

• Angle of incidence = Angle of reflection

• Angle of incidence = Angle of incidence

• Angle of reflection = Angle of translucence

• Angle of reflection = Angle of reflection

The angle of reflection is

• 90 degrees

• 55 degrees

• 45 degrees

• 135 degrees

Refraction is

• The bending of light as it passes through the one substance at an angle

• A light beam shone in one end of an optical fibre and totally internally reflected at the other end

• The bending of light as it passes from one substance to another at an angle

• A type of convex object used in everyday life

The angle of incidence is

• 56 degrees

• 124 degrees

• 90 degrees

• 34 degrees

The principle on which mirror work is

• refraction

• polarization

• reflection

• total internal reflection

What is reflection of light?

• Bending of light waves

• Absorption of light waves

• Changing direction of light waves

• Bouncing back of light waves from a surface

When light travels from air into glass, in which direction does it bend?

• Towards the normal

• Away from the normal

• Perpendicular to the normal

• It does not bend

How does the speed of light change when it enters a denser medium during refraction?

• It increases

• It decreases

• It remains the same

• It becomes zero

What happens when white light passes through a prism?

• It reflects off the prism

• It absorbs into the prism

• It disperses into its constituent colours

• It forms a single colour