Question

An object is placed 20 vm from the concave mirror of focal length 10 cm , then image os formed at

Answer 1

Answer:

20cm from pole in front of lens

Explanation

concave mirror

u=-20

f=-10

1/f=1/v+1/u

1/-10=1/v+1/-20

1/v=1/20-1/10

1/v=1-2/20

1/v=-1/20

v=-20

image is formed 20cm from the pole in front of the lens

nature:

m=-v/u

=-(-20)/-20

= -1

the image is real, inverted and same size image

Hope it helps

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