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Zircon is sometimes used to make fake diamonds. What is its index of refraction if the speed of light in zircon is 1.6 x 10^8 m/s. Please show all work Thank you.

You are in a dark room with a single incandescent 60W bulb in the center of the ceiling. You hold a book directly beneath the bulb and begin lowering it toward the floor. As the book is lowered, what happens to the size of the umbra? I believe it stays th...

An actress wears a blue dress. How could you use spotlights to make the dress appear black? I think you could use black spots. Is this right? Thank you.

Which of the following does not show a difference between the wave theory and particle theory of light; reflection, refraction, interference, diffraction, or polarization? Thank you.

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