What is the highest order maximum for wavelength 429 nm that can be obtained with a grating with 396 lines per mm?
A) 5
B) 11
C) 6
D) 34
E) 4

Question

What is the highest order maximum for wavelength 429 nm that can be obtained with a grating with 396 lines per mm?
A) 5
B) 11
C) 6
D) 34
E) ​4

Quizplus · Accepted Answer

The highest order maximum is given by m = d/λ, where d is the grating spacing and λ is the wavelength. In this case, d = 1/396 mm = 2.52 μm and λ = 429 nm = 0.429 μm. Therefore, m = 2.52 μm / 0.429 μm = 5.87. The highest order maximum that can be obtained is the integer part of this value, which is 5.

What Is the Highest Order Maximum for Wavelength 429 Nm