Physics_52_Sample_Midterm_x1PDF

# Physics_52_Sample_Midterm_x1PDF - Physics 52 Sample Midterm...

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Physics 52 Sample Midterm Exam #1 (25 points) by Todd Sauke Question #1 (5 points). The doublet of the sodium spectrum, in the yellow band, has two constituents having vacuum wavelengths of 589.0 nm and 589.6 nm, respectively. Light of this doublet is propagated at normal incidence through a crystal slab. The index of refraction of the crystal at these wavelengths is 1.873. What is the speed of light from this doublet in the crystal? ____________________ m/s 1 point What is the wavelength of the 589.0 nm light when in the crystal? ___________________ nm 1 point What is the frequency of oscillation of the Electric field for the 589.0 nm light when it is in air? _____________________ Hz 1 point What is the frequency of oscillation of the Electric field for the 589.0 nm light when it is in the crystal? _____________________ Hz 1 point What is the number of waves of the 589.0 nm light that are present in a crystal 1.7 mm thick? ______________________ 1 point ______________________________________________ Question #2. (2 points) As you walk away from a plane mirror on a wall, your image A) gets smaller. B) is always a real image, no matter how far you are from the mirror. C) may or may not get smaller, depending on where the observer is positioned. D) is always the same size.

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