White light passes through an unknown diffraction grating and forms spectra on a…

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

Problem

White light passes through an unknown diffraction grating and forms spectra on a screen

0.80\,\text{m}

away. In first order, the red line (

\lambda = 700\,\text{nm}

) appears

4.0\,\text{cm}

from the central maximum. Calculate the number of lines per centimeter on the grating.