Physics for Scientists and Engineers with Modern Physics
Physics for Scientists and Engineers with Modern Physics
10th Edition
ISBN: 9781337553292
Author: Raymond A. Serway, John W. Jewett
Publisher: Cengage Learning
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Chapter 39, Problem 24P

(a)

To determine

The amplitude of the electric field of the helium-neon laser.

(b)

To determine

The amplitude of the magnetic field of the helium-neon laser.

(c)

To determine

The force exerted by the beam on a perfectly reflecting surface when it is incident perpendicularly.

(d)

To determine

The mass of the ice melted if the beam of laser is absorbed by an ice cube.

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A helium–neon laser produces a beam of diameter 1.75 mm, delivering 2.00 × 1018 photons/s. Each photon has a wavelength of 633 nm. Calculate the amplitudes of (a) the electric fields and (b) the magnetic fields inside the beam. (c) If the beam shines perpendicularly onto a perfectly reflecting surface, what force does it exert on the surface? (d) If the beam is absorbed by a block of ice at 0°C for 1.50 h, what mass of ice is melted?
A helium-neon laser produces a beam of diameter 1.75 mm, delivering 3.15 x 1018 photons/s. Each photon has a wavelength of 633 nm. (a) Calculate the amplitude of the electric field inside the beam. kv/m (b) Calculate the amplitude of the magnetic field inside the beam. μT (c) If the beam shines perpendicularly onto a perfectly reflecting surface, what force does it exert on the surface? nN (d) If the beam is absorbed by a block of ice at 0°C for 2.10 h, what mass of ice is melted? g
A laser emits 5.67 × 101⁹ photons per second in a beam of light that has a diameter of 2.88 mm and a wavelength of 514.5 nm. Determine (a) the average electric field strength and (b) the average magnetic field strength for the electromagnetic wave that constitutes the beam. (a) Number i (b) Number i Units Units
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