Q .     An eye can detect `5 xx 10^(4)` photons per square
metre per sec of green light `(lamda = 5000 A)` while
the ear can detect `10^(-13)W/m^(2)` The factor by
which the eye is more sensitive as a power
detector then the ear is close to

VIT 2014
A

`5`

B

`10`

C

`10^(6)`

D

`15`

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