Question

In order to obtain a magnification of, −1.5 with a concave mirror of focal length 16 cm, the object will have to be placed at a distance
(a) between 6 cm and 16 cm
(b) between 32 cm and 16 cm
(c) between 48 cm and 32 cm
(d) beyond 64 cm

Answer 1

The object should be placed between 32 cm and 16 cm in order to obtain a magnification of -1.5 with a concave mirror of focal length 16 cm.  

Explanation:

Provided:

Formula for mirror

V = 1.5u

$\frac{1}{v} +\frac{1}{u} =\frac{1}{f}$

$\frac{1}{1.5u} +\frac{1}{u} = \frac{1}{16}$

$2+ \frac{3}{3u} = \frac{1}{16}$

$3u = 16\times s$

So, we need to place the object between the centre of curvature and the focus.

You can get all the answers of Chapter 4 in the link below:

https://brainly.in/question/14963178

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