Questions about Lenses

The focal _______ is the distance from the centre of the lens to where light rays converge.

• length
• lense

• concave

• convex

Light rays coming together.

• diverge

• Do not pass through

• converge

• reflect

Images formed by concave lenses are always smaller and _______.

• upside down

• do not appear

• no image formed

• upright

A concave lens is _______ at the edges.

• smaller

• thicker

• thinner

• bigger

Light rays spreading apart.

• diverge

• converge

• outwards

• inward

Describe the image that is produced by a concave lens.

• it is upright and larger than the object

• it is upright and smaller than the object

• it is upside down and larger than the object

• it is upside down and smaller than the object

A concave lens reflects light rays

• towards the normal

• away from the normal

• along the normal

• none of the above

A convex lens reflects light rays

• towards the normal

• away from the normal

• along the normal

• none of the above

If the object is more than two focal lengths from a convex lens, the image will be

• upside down and smaller

• upside down and larger

• upright and larger

• no image forms

The point where the rays meet is known as....

• Fire
• the focal point
• refraction
• Plane of the lens