2. A diffraction grating with 4525 lines/cm is illuminated by direct sunlight. T

Question

2. A diffraction grating with 4525 lines/cm is illuminated by direct sunlight. The first-order solar spectrum is spread out on a white screen hanging on a wall opposite the grating.
a. At what angle does the first-order maximum for blue light with a wave-length of 422 nm appear?

b. At what angle does the first-order maximum for red light with a wave-length of 655 nm appear?

3. A grating with 1555 lines/cm is illuminated with light of wavelength
565 nm. What is the highest-order number that can be observed with this grating? (Hint: Remember that sin q can never be greater than 1 for a dif- fraction grating.)

4. Repeat item 3 for a diffraction grating with 15 550 lines/cm that is illu- minated with light of wavelength 565 nm.

5. A diffraction grating is calibrated by using the 546.1 nm line of mercury vapor. The first-order maximum is found at an angle of 21.2

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