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4.4 Exercise 10

Avg difficulty 2.5

An opal such as that shown in the figure acts like a reflection grating with rows separated by about 8μm.8 \mu\text{m} . If the opal is illuminated normally, (a) at what angle will red light be seen and (b) at what angle will blue light be seen?

OpenStax University Physics Volume 3, 4.4 Diffraction Gratings, exercise 10

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Adapted from University Physics Volume 3 © 2016 Rice University. Licensed under CC BY 4.0. Source: University Physics Volume 3. Imported at revision db44eb9.