Question

11.A source produces first-order lines when incident normally on a 9200 slits/cm diffraction grating at angles θ1 = 28.8∘, θ2 = 36.7∘, θ3 = 38.6∘, and θ4 = 41.2∘.

Part A What are the wavelengths? Express your answers using three significant figures separated by commas.

13. At what angle should the axes of two Polaroids be placed so as to reduce the intensity of the incident unpolarized light to 1/4

Express your answer using two significant figures.

Answer 1