Question

The focal length of a huge concave mirror is 120 cm. A man is standing in front of it at a distance of 40 cm. What are the characteristics of his image in that mirror ?

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Answer 1

QUESTION :

The focal length of a huge concave mirror is 120 cm. A man is standing in front of it at a distance of 40 cm. What are the characteristics of his image in that mirror ?

ANSWER :

• Image form in the mirror

• Virtual image

• Erected image

• Enlarged image

Answer 2

$\huge{\mathcal{\purple{A}\green{N}\pink{S}\blue{W}\purple{E}\green{R}\pink{!}}}$

Here u=(-40)cm,f=(-120)cm.

1/v+1/u=1/f

=>1/v=1/f-1/u

=1/(-120)-(-1/40)

=(1/40)-1/120

=1/60

=>v=60cm.

so,

magnification=60/(-40)=-1.5

=>the image is virtual,magnified, erect.