"Perfect Mirrors" Are Made by

question 16

Multiple Choice

"Perfect mirrors" are made by

• A)coating a glass surface with an extremely pure layer of silver or aluminum.
• B)coating a glass surface with an extremely pure layer of silver or aluminum and then coating the metal surface with a quarter-wavelength thickness of the dielectric magnesium fluoride.
• C)stacking thin layers of different dielectric materials on a glass surface.
• D)heating an ordinary mirror almost to its melting point.

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