QUESTION-4: Consider a laser beam with a diameter of 5 mm and carrying 60 W power. (Take c=3x10 m/s, 7=3 and μ-4xx107 Tm/A) a) Determine the intensity of the laser. b) If the light is incident normally on a plane surface absorbing 30% and reflecting rest, determine the force on the surface.

QUESTION-4: Consider a laser beam with a diameter of 5 mm and carrying 60 W power. (Take c=3x10 m/s, 7=3 and μ-4xx107 Tm/A) a) Determine the intensity of the laser. b) If the light is incident normally on a plane surface absorbing 30% and reflecting rest, determine the force on the surface.

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter39: Relativity

Section39.7: The Relativistic Doppler Effect

Problem 39.3CE

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Concept explainers

Compton effect

The incoming photons' energy must be in the range of an X-ray frequency to generate the Compton effect. The electron does not lose enough energy that reduces the wavelength of scattered photons towards the visible spectrum. As a result, with visible lights, the Compton effect is missing.

Recoil Velocity

The amount of backward thrust or force experienced by a person when he/she shoots a gun in the forward direction is called recoil velocity. This phenomenon always follows the law of conservation of linear momentum.

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