a 5 mm object is placed vertically in front of concave mirror. A 2
mm long image of the awl pin is formed at 30cm in front of mirror . calculate focal length
Answers
Answered by
0
Answer:
a 10 mm long awl pin is placed vertically in front of concave mirror.a 5mm long image of the awl pin is formed at 30cm in front of mirror . calculate focal length
Answer
4.0/5
275
shoonab
Ambitious
30 answers
2.9K people helped
m= h'/h= -v/u
5/10=-30/u
u=-300/5
u=-60cm
1/f=1/v+1/u
1/f = 1/-30 + 1/-60
1/f = -2-1/60
1/f=-3/60
1/f=-1/20
f=-20cm
Therefore the focal length of the concave mirror is 20 cm front of the mirror.
Explanation:
Similar questions