Q15 of 284 Page 256

Only one of the following applies to a concave lens. This is:

Image is always formed in front of the mirror thus can not be negative.

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13

The diverging lens in part (a) is replaced by a converging lens also of focal length 100 mm. The object remains in the same position and an image is formed by the converging lens. Compare two properties of this image with those of the image formed by the diverging lens in part (a).

 14

A concave lens produces an image 20 cm from the lens of an object placed 30 cm from the lens. The focal length of the lens is:

 16

The magnification produced by a spherical mirror and a spherical lens is + 0.8.

 17

The magnification produced by a spherical lens and a spherical mirror is+ 2.0.