Light of wavelength 600 nm is incident normally on a diffraction grating 3.00 cm wide. If second order line is observed at an angle of 30°, what is the total number of lines on the grating?

Light of wavelength 600 nm is incident normally on a diffraction grati

1.	Light of wavelength 600 nm is incident normally on a diffraction grating 3.00 cm wide. If second order line is observed at an angle of 30°, what is the total number of lines on the grating?
A.	14500
B.	15000
C.	12500
D.	13500
Answer» D. 13500

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Light of wavelength 600 nm is incident normally on a diffraction grating 3.00 cm wide. If second order line is observed at an angle of 30°, what is the total number of lines on the grating?

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