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प्रश्न
A light source of wavelength 520 nm emits 1.04 × 1015 photons per second while the second source of 460 nm produces 1.38 × 1015 photons per second. Then the ratio of power of second source to that of first source is
पर्याय
1.00
1.02
1.5
0.98
उत्तर
1.5
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