Hidden Gaussian

EasyPractice Problems

72.Hidden Gaussian

+10

A student measures the intensity

I

of a laser beam at various radial distances

r

from the beam axis. When the student plots

\ln I

on the vertical axis against

r^2

on the horizontal axis, the data fall on a straight line with negative slope and positive vertical intercept. Which of the following best describes the functional dependence of

I

r

? Below,

A

and

B

are positive constants.

I = A - Br^2

I = Ae^{-Br}

I = Ae^{-Br^2}

I = A/r^B

I = A/r^2

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