Which of the following sources provides the best monochromatic light?
(a) A candle
(b) A bulb
(c) A mercury tube
(d) A laser

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Solution

(d) A laser

Among the given sources, laser is the best coherent source providing monochromatic light with constant phase difference.

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Which of the following sources provides the best monochromatic light? (a) A candle (b) A bulb (c) A mercury tube (d) A laser

(d) A laser Among the given sources, laser is the best coherent source providing monochromatic light with constant phase difference.

Which of the following sources provides the best monochromatic light?
(a) A candle
(b) A bulb
(c) A mercury tube
(d) A laser

(d) A laser

Among the given sources, laser is the best coherent source providing monochromatic light with constant phase difference.