A diffraction grating of 1000 lines has red light of wavelength 700 nm pass through it

PHYSICS · Single correct · AP · Physics 2: Algebra-based · Waves Sound and Physical Optics · Waves Sound and Physical Optics

Problem

2. A diffraction grating of 1000 lines /cm/ \mathrm{cm} has red light of wavelength 700 nm pass through it. The distance between the first and third principal bright spots on a screen 2 m away is (A) 14 cm (B) 28 cm (C) 42 cm (D) 140 cm

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