A Monochromatic Beam of Light of Wavelength 600 Nm Falls

question 68

Multiple Choice

A monochromatic beam of light of wavelength 600 nm falls on a grating at normal incidence and produces a second-order image at an angle of 30º.The grating spacing must be

• A)0.60 µm
• B)2.4 µm
• C)0.30 µm
• D)1.4 µm
• E)1.0 µm