Concept explainers
The wavelengthsof
Answer to Problem 38P
First wavelength is
Explanation of Solution
Given info:
Number of grating lines per cm,
The first order spectral lines at
Formula used:
Where,
Calculation:
Because the angles on each side of the central line are not the same, the incident light is not normal to the grating.
Now, calculate the average angles:
The path difference is an integer multiple of the wavelength in constructive interference.
Rearrange the given formula:
Now, calculate the wavelengths by using
For angle
For angle
Conclusion:
The required wavelengths: First wavelength is
Chapter 24 Solutions
Physics: Principles with Applications
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