3.The image of a candle flame placed 5 points
at a distance of 30 cm from a
sphercial mirror is formed on a
screen placed on the same side of
the mirror at a distance of 60 cm
from the mirror. Calculate it's focal
length. *
- 20 cm
0 - 15
+ 15
0 + 20 cm
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Answers
Answered by
0
Answer:
The answer is = -20
Explanation:
The nature of the mirror is concave since the image formed is real. Hence, the focal length of the concave mirror is 20 cm. Thus, the image height is 4.8 cm. Image formed by the mirror is inverted.
Answered by
0
Answer:
+20cm
Explanation:
Given, u= - 30cm
v= 60cm
f=?
using mirror formula,
=1/v - 1/u = 1/f
= 1/60 -1/(-30) = 1/f
= 1/60 + 1/30 =1/f
= 1+2/60 = 1/f
= 3/60=1/f
= f = 60/3
= f = 20cm
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