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a) A laser beam is incident on a single slit of width 0.020 mm. On a...

a) A laser beam is incident on a single slit of width 0.020 mm. On a viewing screen placed 1.20 m away from the slit, the first minimum is observed at a distance 2.40 cm from the center of the screen. What is the wavelength of the laser used (in nm)? [6] (b) Laser light of wavelength 480 nm is incident on a transmission grating with 2000 groves/cm. How far away from the center of a screen placed at a distance 3.00 m away will you observe the first order (m = 3) bright peak? (Assume normal incidence)

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