Home
Class 12
PHYSICS
The eye can detect 5 xx 10^4 phot ons//m...

The eye can detect `5 xx 10^4 phot ons//ms^2` of light of wavelength 500 nm. The ear can detect `10^-13 W//m^2`. As a power detector, which is more sensitive ?

A

Sensitivity of eye is one-fifth of the ear

B

Sensitivity of eye is five times that of ear

C

Both are equally sensitive

D

Eye cannot be used as power detector.

Text Solution

Verified by Experts

Promotional Banner

Similar Questions

Explore conceptually related problems

Eye detects the green light (lambda = 5000 overset@A), 5 xx 10^4 photons per square metre per second and the ear can detect 10^-13 watt per square metre. In form of power detector, the eye is sensitive in comparison to the ear by

Minimum light intensity that can be perceived by normal human eye is about 10^-10 W m^-2 . What is the minimum number of photons of wavelength 660 nm that must enter the pupil in one second, for one to see the object ? Area of cross-section of the pupil is 10^-4 m^2 ?

Lithium has a work function of 2.3 eV. It is exposed to light of wavelength 4.8 xx 10^(-7) m. Find the maximum kinetic energy with which the electron leaves the surface. What is the longest wave length which can produce the photo electrons ? Data : W = 2.3 eV, h=6.626 xx 10^(-34)Js, e=1.6 xx 10^(-19) C. Longest wavelength = ? , Kinetic energy = ?

In a Young.s doubles slit experiment the slit separation is 0.5m from the slits. For a monochromatic light of wavelength 500nm, the distance of 3^(rd) maxima from 2^(nd) minima on the other side is