Concept explainers
The rate at which photons enter the pupil.
Answer to Problem 70GP
Explanation of Solution
Given info:
Wavelength,
Diameter is
Power is
Energy emits
Formula used:
Where,
Calculation:
The energy of the photon is
So,
Because the light radiates uniformly, the intensity at a distance
So, the rate at which energy enters the pupil is
Therefore, the rate at which photons enter the pupil:
Now, substitute all the known and given values:
Conclusion: The required value is
Chapter 27 Solutions
Physics: Principles with Applications
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