I have a doubt in an AIEEE-level Physics question ?
I need some help with this particular question:
A concave mirror of focal length f is taken.Few drops of water are sprinkled on it.The objest needle and image needle will coincide at:
a) 2f
b)3f/2
c) f
d)2f/3
The answer is b) 3f/2
But i don't understand why because i used to think that focal...
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I need some help with this particular question:
A concave mirror of focal length f is taken.Few drops of water are sprinkled on it.The objest needle and image needle will coincide at:
a) 2f
b)3f/2
c) f
d)2f/3
The answer is b) 3f/2
But i don't understand why because i used to think that focal length of a mirror in water is the same as that in air.Now I'm confused:(
If anyone knows the answer please let me know...And a little detail would be nice too cause i honestly can't comprehend the concept behind this!
A concave mirror of focal length f is taken.Few drops of water are sprinkled on it.The objest needle and image needle will coincide at:
a) 2f
b)3f/2
c) f
d)2f/3
The answer is b) 3f/2
But i don't understand why because i used to think that focal length of a mirror in water is the same as that in air.Now I'm confused:(
If anyone knows the answer please let me know...And a little detail would be nice too cause i honestly can't comprehend the concept behind this!
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