Concept explainers
The number of photons.
Answer to Problem 86GP
Explanation of Solution
Given info:
Wavelength,
Total power output is
The earth-sun distance, radius,
Intensity is
Formula used:
Where,
Calculation:
First calculate the area of sphere whose radius is the Earth−Sun distance by using the formula,
Secondly, to calculate the Sun’s total power output, multiply this by given intensity:
Thirdly, to calculate an annual energy output, multiply by the number of seconds in a year:
Now, to calculate the number of photons per year, divide by the energy of one photon:
Conclusion:
The required value is
Chapter 27 Solutions
Physics: Principles with Applications
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