In a double-slit interference experiment, a wave from one slit arrives at a point on a screen one wavelength behind the wave from the other slit. What is observed at that point?

a. dark fringe
b. bright fringe
c. multicolored fringe
d. gray fringe, neither dark nor bright


Ans: b. bright fringe

Physics & Space Science

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Indicate whether the statement is true or false

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A) aren't massive enough. B) are too heavy. C) ride on straight tracks. D) encounter opposing forces.

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Ansel places an object 30 cm from a thin, convex lens along the axis. If a real image forms at a distance of 15 cm from the lens, what is the focal length of the lens?

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Physics & Space Science