(1) A highly polished surface reflects most of the light falling on it.

(2) Image formed by a plane mirror is inverted.

(3) Green leaves appear green because it absorbs green light.

(4) In simple terms a plane mirror is a plane polished surface.

(5) Translucent glass is also used as mirrors.

(6) In diffused reflection also, the angle of incidence is equal to angle of reflection.

(7) The colour of an opaque object is decided by the colour of light falling on it.

(8) A reflected light can never be reflected again

(9) For a point object the image formed by a plain mirror is large.

(10) The speed of light through glass is less than in, air.

(1) The bouncing of light from a mirror is called ____________.

(2) When the left side appears to be the right side in an image it is called ____________.

(3) For regular reflection to occur, the surface must be ____________.

(4) The reflected ray is the angle between ____________ and ____________.

(5) An image is formed when two or more rays ____________.

(6) Black objects appear dark because ____________.

(8) Dull objects reflect ____________.

(9) When the three primary colours are mixed ____________ proportion, white is the result.

(10) When a green light falls on a red rose its colour will become ____________.

(7) The place where the incident ray strikes the mirror is called ____________.

(1) What is reflection of light?

(5) In a ray diagram what is “Normal”?

(8) What is a water image?

(10) What are the primary colours of subtractive mixing?

(2) Why do some objects appear bright and shiny?

(3) If a black object absorbs all the light how do we see it?

(4) Why do mirrors form proper images but polished rough surfaces don’t?

(6) If transparent objects allow light to pass through them; then how are we able to see them?

(7) State three characteristics of images formed by a plane mirror.

(9) Name the colours of the rainbow.

(1) Draw a ray diagram and label incident ray, normal and reflected ray.

(5) Why are the ceilings of rooms usually painted white?

(8) Explain in brief the conditions needed for the formation of a rainbow.

(2) State the laws of reflection.

(3) What are various uses of plane mirrors?

(4) Why are cinema screens not made of polished surfaces?

(6) How are we able to see colour of an object?

(7) How do the position of image change in a plane mirror with the change in position of the object? Explain with a diagram.

(9) Name the primary colours for mixing. Which colours do we get when pairs of these are mixed?

(10) Why rainbows are always seen in the afternoon or in the morning? Explain.

Direction

The angle of reflection

Light from the object reaches our eyes

The reflection from the screen is diffuse reflection.

Light moves around the object

Of the same size

White

Used as a reflector in street lights

It reflects light of green colour only

The image can be projected on a screen.

Light from the object reaches our eyes

Used as a reflector in street lights