A Diffraction-Limited Laser of Length and Aperture Diameter D $\lambda$

question 15

Multiple Choice

A diffraction-limited laser of length and aperture diameter d generates light of wavelength $\lambda$ . If the beam is directed at the surface of the Moon a distance D away, the radius of the illuminated area on the moon is approximately:

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Definitions:

Microorganisms

Tiny living organisms, such as bacteria, viruses, fungi, and protozoa, that can only be seen under a microscope.

Muslin

A lightweight, breathable cotton fabric used for making clothes, curtains, and other items.

National Notifiable Disease Surveillance System

A system used in the United States to monitor the occurrence and spread of designated notifiable diseases.