12 Light 2022 J

A card is placed in front of a plane mirror so that its label is facing the mirror, as shown. The label is shown as 'Ci'.

How does the image of the label formed by the mirror appear to the observer?

An object is placed in front of a converging lens. The lens has a focal length f.

In which labelled position should the object be placed in order to produce a real image that is smaller than the object?

A student uses one eye to look at images in a plane mirror. Objects are placed on the line XY. Which objects give rise to images that can be seen by the eye at E?

• P, Q, R, S, T and U

• Q, R, S and T only

• P and U only

• R and S only

A ray of light passes from air through a sheet of glass and out the other side, as shown.

Which two angles are equal to each other?

• angle of incidence at boundary 1 and angle of incidence at boundary 2

• angle of incidence at boundary 1 and angle of refraction at boundary 1

• angle of incidence at boundary 1 and angle of refraction at boundary 2

• angle of refraction at boundary 1 and angle of refraction at boundary 2

A thin converging lens can produce both real and virtual images. Which row describes a real and a virtual image?

The speed of light in air is 3.0 x 10⁸ m/s.

The critical angle for light in a transparent plastic material placed in air is 37⁰ .

What is the speed of light in the plastic material?

• 1.8 × 10⁸ m/s

• 2.4 × 10⁸ m/s

• 3.8 × 10⁸ m/s

• 5.0 × 10⁸ m/s

An object is placed in front of a converging lens of focal length 15 cm.

Which row describes the image of the object?

A plane mirror is fixed to a vertical wall.

A boy looks at the image of himself in the mirror.

Which statement describes the image formed?

• real and upright

• real and upside down

• virtual and upright

• virtual and upside down