February 21, 2017

Homework Help: Physics

Posted by Larry on Sunday, November 18, 2012 at 9:50am.

A film of magnesium fluoride (n=1.38), 1.25x10^-5 cm thick, is used to coat a camera lens (n=1.55). Are any wavelengths in the visible spectrum intensified in the reflected light?

Bats use the reflections from ultra-high frequency sound to locate their prey. Estimate the typical frequency of a bat's sonar. Take the speed of sound to be 3.40x10^2 m/s, and a small moth 3.00mm across, to be a typical target.

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