A radiation detector exposed to sunlight records the energy falling on a given area each unit...
A radiation detector exposed to sunlight records the energy
falling on a given area each unit time. If
such a detector has a reading of 0.430 cal cm-2 min-1, how many
photons of sunlight are striking
each cm2 in one minute? Assume the average wavelength of sunlight
is 460. nm.
Homework Answers
We know that
Energy of photon = hc / wavelength
h =planck's constant = 6.63. 10^
reading of the detector : 0.43 cal in one min
(0.43/4.184) J in one min
= 0.1027 J in one min
E each cm^2 in one minute = 0.1027 J
we know,
E = nhv
0.1027 J = n * 6.26 * 10^-34 * 460
n = 3.56 * 10 ^ 29
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