The wave front shown at the left for light in air reaches the plane surface (shown by a slanted line) that bounds a medium with n = 1.50. Which diagram below correctly shows the wave front while entering the medium at the right?

Question

The wave front shown at the left for light in air reaches the plane surface (shown by a slanted line) that bounds a medium with n = 1.50.  Which diagram below correctly shows the wave front while entering the medium at the right?

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The Answer of The wave front shown at the left for light in air reaches the plane surface (shown by a slanted line) that bounds a medium with n = 1.50.  Which diagram below correctly shows the wave front while entering the medium at the right?

The Wave Front Shown at the Left for Light in Air