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professor190 [17]
3 years ago
9

A 142 cm tall person stands

Physics
1 answer:
xxTIMURxx [149]3 years ago
4 0

Answer:

Height of the image is 9.06 cm

Explanation:

As we know that the person is standing 250 cm from the lens

Now we know that the focal length of the lens is

f = 15 cm

now by lens formula we have

\frac{1}{f} = \frac{1}{d_i} + \frac{1}{d_o}

\frac{1}{15} = \frac{1}{d_i} + \frac{1}{250}

d_i = 15.96 cm

now we know by the formula of magnification

\frac{h_i}{h_o} = \frac{15.96}{250}

now we have

h_o = 142 cm

h_i = 142\times \frac{15.96}{250}

h_i = 9.06 cm

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