12 Light – 2023

Which diagram correctly shows the dispersion of white light through a glass prism?

A ray of light is reflected by a plane mirror.

Which row shows the angle of incidence and the angle of reflection?

• P, Q

• P, S

• Q, R

• R, S

A thin converging lens is used to produce a real image of an object.

Which statement about the real image is always correct?

• It is nearer to the lens than the object.

• It is on the opposite side of the lens to the object.

• It is the same size as the object.

• It is upright.

Red, green and violet lights are part of the visible spectrum of light.

What is the order of colours from shortest to longest wavelength?

• red → green → violet

• red → violet → green

• violet → red → green

• violet → green → red

Which diagram shows the image correctly formed by reflection?

A student passes parallel rays of light through four different converging lenses. He measures the distance x and the distance y for each experiment.

Which lens has the longest focal length?

• x = 4.6 cm, y = 2.0 cm

• x = 5.1 cm, y = 3.1 cm

• x = 5.9 cm, y = 2.3 cm

• x = 6.1 cm, y = 2.4 cm

A beam of light from the Sun strikes a prism.

The dispersed beam is incident on a white wall between X and Y. Which colours are seen at X, Z and Y?

• X: red, Z: green, Y: violet

• X: red, Z: violet, Y: green

• X: violet, Z: green, Y: red

• X: violet, Z: red, Y: green

The diagram shows a ray of light incident on a plane mirror.

The angle between the ray and the mirror is 35°.

The ray is reflected by the mirror.

What is the angle of reflection?

• 35°

• 55°

• 70°

• 110°

A thin converging lens in a camera produces a real image on a photo-sensitive surface, as shown.

At which position is the image of the top of the object formed?

The diagram shows part of a ray diagram that demonstrates the formation of a virtual image Y of object X by a converging lens.

One ray of light from X is shown approaching the lens.

Which arrow shows the direction of this ray as it leaves the lens?

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