The luminous efficiency of a monochromati csource is always greater than that of a white light source of same power.
B
the luminous efficiency of a monochromatic source of weavelength 555 m is always greater than that of white light source of same water.
C
The iluminating power of a monochromatic source of wavelenght 555 nm is always greater than that of a white light source of same power.
D
the illuminating power of a monochromatic source is always greater than that of a white light soure of same water.
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The correct Answer is:
B, C
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