Light is incident normally on a diffraction grating having 5000 lines/cm. Second order line is observed at an angle of 30°. What is the wavelength of light?

Light is incident normally on a diffraction grating having 5000 lines/

1.	Light is incident normally on a diffraction grating having 5000 lines/cm. Second order line is observed at an angle of 30°. What is the wavelength of light?
A.	6000 Å
B.	5800 Å
C.	4000 Å
D.	5000 Å
Answer» E.

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Light is incident normally on a diffraction grating having 5000 lines/cm. Second order line is observed at an angle of 30°. What is the wavelength of light?

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