Question

Pls answer this...........

Answer 1

M=-1

V=-u

U=-4cm

V+4cm

Therefore Lens=convex

The focal length =+2 cm

Answer 2

Answer:

CONVEX LENS SHOULD BE USED

Explanation:

FOCAL LENGTH

1/f =1/v-1/u

1/f = 1/4 -1/-4

1/f = 2/4

1/f = 1/2

#@+|+₹+#+|+|

f=2cm.......

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