When an object of height 1 cm is kept at a distance 4 cm from a concave mirror is attract image of height 1.5 cm is formed at a distance 1 centimetre behind mirror find the focal length of the mirror
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2
Answer:
Distance from the mirror of object of height 1cm= 4cm =u
Distance of image from the mirror=1cm=v
Hence,focal length,f=
1/f=1/v+1/u
=1/4+1/1
f=2/3cm
Hence,focal length =2/3cm
Answered by
0
Answer:
Explanation:
u = - 4cm
v = 1 cm
1/f = 1/u + 1/v
= 1/f = -1/4 + 1/1
= 1/f = { -1 + 4}/4
= 1/f = 3/4
= f = 4/3 cm
= f = 1 1/3 cm
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