Question Detail

PHY 104 Diffraction and Interference of light waves Objective Question
Take CBT

Question

In the diffraction grating equation (d sin θn = nλ), what does the integer 'n' represent?
Options
A The number of slits in the grating.
B The wavelength of the incident light.
C The order of the bright fringe (e.g., first-order, second-order).
Correct Answer
D The spacing between the slits.
Correct Answer

Option C is the correct answer.

Detailed Explanation

The text states, 'The first-order fringe occurs when n=1. ... The second-order spectrum occurs when the paths differ by two wavelengths.' This shows that 'n' corresponds to the order of the bright fringe.

Hint

Refer to the explanation of 'order of fringes' on page 6.

Question Info

Course: PHY 104
Topic: Diffraction and Interference of light waves
Type: Objective
Difficulty: Not specified
Question 501 of 947
Previous Course Details Next