Modern Physics> photons-emitted...

The number of photons emitted in 10 hours by a 60 W sodium lamp
(wavelength of photon = 6000 A)
(A) 6.50 × 1024
(B) 6.40 × 1023
(C) 8.40 × 1023
(D) 3.40 × 1023
[Take hc = 12400 eVA, h = Planck’s constant, c = speed of light]

Amit Saxena , 12 Years ago

Grade upto college level

1 Answers

Aditi Chauhan

(A)

Sol. Let n be the number of photons emitted

=> (12400× 1.6 × 10^–19 × n)/6000 = 60 × 10 × 60 × 6

=> n = 6.5 × 10²⁴

Last Activity: 12 Years ago

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Modern Physics> photons-emitted...

The number of photons emitted in 10 hours by a 60 W sodium lamp (wavelength of photon = 6000 A) (A) 6.50 × 1024 (B) 6.40 × 1023 (C) 8.40 × 1023 (D) 3.40 × 1023 [Take hc = 12400 eVA, h = Planck’s constant, c = speed of light]

Amit Saxena , 12 Years ago

Aditi Chauhan

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The number of photons emitted in 10 hours by a 60 W sodium lamp
(wavelength of photon = 6000 A)
(A) 6.50 × 1024
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