Created by StemPy LabA block of glass has a cavity of air inside it, in the shape of a biconvex lens. A narrow parallel beam of light travels through the glass along the axis of the cavity. What does the cavity do to the beam?
← All Quizzes
← For a demonstration, a thin glass lens of refractive index 1.5 and focal length 14 cm in air is lowered into a tank of water of refractive index 1.33. What is its focal length under the water?Light enters a piece of glass of refractive index 1.6, shaped as a plano-convex lens, through its curved side, which has a radius of 39 cm. It is reflected by a silver coating on the flat side. Seen from the front, the piece acts as a concave mirror. What is its focal length? →
More onOptics
Discussion (0)
Log in to join the discussion.
Loading…