Light and Optics Quiz

The diagram shows a ray of light incident on the boundary between two mediums W and X. The mediums have different refractive indexes. Some light is reflected and some passes along the surface between the two mediums. Angle y is greater than angle z. Which statement is correct?

• W has a greater refractive index than X and angle y is equal to the critical angle.

• W has a greater refractive index than X and angle z is equal to the critical angle.

• X has a greater refractive index than W and angle y is equal to the critical angle.

• X has a greater refractive index than W and angle z is equal to the critical angle.

A converging glass lens is used to produce a virtual, magnified image. Which ray diagram shows the rays passing through the converging lens?

• A

• B

• C

• D

A swimming pool is lit by an underwater light. A ray of light is incident on the water surface. What is the correct path for the ray of light?

• A

• B

• C

• D

Which diagram shows the action of a converging lens on a parallel beam of light?

• A

• B

• C

• D

White light enters a prism and forms a spectrum. The rays in the air are labelled. Which diagram shows how the white light is dispersed by the prism?

• A

• B

• C

• D

The diagram shows a ray PQ reflected by mirror X to a parallel mirror Y. The reflected ray along RS is parallel to PQ.

Which statement is correct?

• The angle between PQ and QR is 45.

• The angle between QR and RS is 180.

• The angle of incidence of PQ on mirror X is 60.

• The angle of incidence of QR on mirror Y is 45.

An object is viewed through a thin converging lens. The diagram shows the paths of two rays from the top of the object to an eye. How does the image compare with the object?

• It is larger and inverted.

• It is larger and upright.

• It is smaller and inverted.

• It is smaller and upright.

The diagram shows two divergent rays of light from an object O being reflected from a plane mirror. At which position is the image formed?

• A

• B

• C

• D

Light is incident on a mirror at an angle of 45 as shown. The mirror can be rotated about an axis into the page through point X. The mirror is rotated until the light is reflected back along its original path. Through which angle is the mirror rotated?

• 22.5 clockwise

• 22.5 anticlockwise

• 45 clockwise

• 45 anticlockwise

The diagrams show light incident on the straight edge of a semi-circular glass block after passing through it. Which diagram shows refraction and an angle i equal to the critical angle of the glass?

• A

• B

• C

• D