The eye can detect 5 ´ 104 photons per square metre per sec of green – McqOptions

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1.	The eye can detect 5 ´ 104 photons per square metre per sec of green light (l = 5000 Å) while the ear can detect \[{{10}^{-13}}\,(W/{{m}^{2}})\]. The factor by which the eye is more sensitive as a power detector than the ear is close to
A.	5
B.	10
C.	106
D.	15
Answer» B. 10

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