Assume the mostly infrared radiation from a heat lamp acts like a continuous wave with wavelength of 1.50 µm. • If the lamp's 200-W output is focused on a person's shoulder, over a circular area 21.0 cm in diameter, what is the intensity in kW/m??

Assume the mostly infrared radiation from a heat lamp acts like a continuous wave with wavelength of 1.50 µm. • If the lamp's 200-W output is focused on a person's shoulder, over a circular area 21.0 cm in diameter, what is the intensity in kW/m??

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter24: Electromagnetic Waves

Section: Chapter Questions

Problem 9CQ: Figure 24.26 shows the interference pattern of two radio antennas broadcasting the same signal....

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Concept explainers

Interference of Light

The word "constructive" signifies addition in interference. Constructive interference occurs when the path of the waves that start from the slit differs by 1 entire wavelength or in the intervals of the same. Hence, the waves that are presented on the screen are in phase (crest to crest/trough to trough). The waves interfering constructively forms bright fringes on the screen.

Question

Assume the mostly infrared radiation from a heat lamp acts like a
continuous wave with wavelength of 1.50 µm.
• If the lamp's 200-W output is focused on a person's shoulder,
over a circular area 21.0 cm in diameter, what is the intensity
in kW/m??
Provide the solution (3 decimal places):
kW/m?

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