Check Your Understanding: Question 25.05 The photograph shows an experimental de

Question

Check Your Understanding: Question 25.05 The photograph shows an experimental device at Sandia National Laboratories in New Mexico. This device is a mirror that focuses sunlight to heat sodium to a boil, which then heats helium gas in an engine. The engine does the work of driving a generator to produce electricity. The sodium unit and the engine are labeled in the photo. (a) What kind of mirror, concave or convex, is being used? (b) Where is the sodium unit located relative to the mirror? Express your answer in terms of the focal length of the mirror. Sodium unit and engine

Explanation / Answer

concave mirror:- concave mirror is called as converging mirror whose reflecting surface bulges inward.

principal focus: the principal focus is a point on principal axis in which all the light after reflection meet.

so the answer is

a) concave b) a distance +f from the mirror

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