A wavelength of 465 nm yields a first order maximum at 26.6° with a grating.At what angle will the third order maximum appear for this wavelength?
A) 13°
B) 90°
C) -26.6°
D) No third order maximum exists in this case.
E) 1.50°

Question

A wavelength of 465 nm yields a first order maximum at 26.6° with a grating.At what angle will the third order maximum appear for this wavelength?
A) 13°
B) 90°
C) -26.6°
D) No third order maximum exists in this case.
E) ​1.50°

Quizplus · Accepted Answer

The third order maximum would require an angle that satisfies the grating equation for m=3. However, the sine of the angle would exceed 1, which is not possible, indicating no third order maximum exists.

A Wavelength of 465 Nm Yields a First Order Maximum