Modern Physics> photo electric effect...

Calculate the number of photons emitted per secound by a 10W sodium vapour lamp. assume that 60% of the consumed energy is converted into light. Wavelength of sodium light = 590nm ?

Asheesh Tyagi , 14 Years ago

Grade 12th Pass

1 Answers

Sandeep Pathak

Last Activity: 11 Years ago

Light energy emitted per second is E = 0.60 x 10 = 6 J/s.
Let n be the number of photons emitted per second. Then,
n x hc/l = E

This gives
n = 6 x 590 x 10^-9/(3 x 10⁸ x 6.63 x 10^-34) = 1.78 x 10¹⁹/s.

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Modern Physics> photo electric effect...

Calculate the number of photons emitted per secound by a 10W sodium vapour lamp. assume that 60% of the consumed energy is converted into light. Wavelength of sodium light = 590nm ?

Asheesh Tyagi , 14 Years ago

Sandeep Pathak

LIVE ONLINE CLASSES

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