Last Updated On [03-11-2023]
A camera objective has an aperture diameter 
. If the aperture is reduced to diameter 
, the exposure time under identical conditions of light should be made
a)
fold
b)
2 fold
c)
2
fold
d)
4 fold
A camera objective has an aperture diameter . If the aperture is reduced to diameter , the exposure time under identical conditions of light should be made
a)
fold
b)
2 fold
c)
2 fold
d)
4 fold
Question ID - 152333 :-
A camera objective has an aperture diameter . If the aperture is reduced to diameter , the exposure time under identical conditions of light should be made
a)
fold
b)
2 fold
c)
2 fold
d)
4 fold
|
A camera objective has an aperture diameter |
|||||||
|
a) |
|
b) |
2 fold |
c) |
2 |
d) |
4 fold |
Next Question :
|
A glass lens is placed in a medium in which it is found to behave like a glass plate. Refractive index of the medium will be |
|
|
a) |
Greater than the refractive index of glass |
|
b) |
Smaller than the refractive index of glass |
|
c) |
Equal to refractive index of glass |
|
d) |
No case will be possible from above |
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