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The energy flux of sunlight reaching the...

The energy flux of sunlight reaching the surface of the earth is `1.388 xx10^(3) "W/m"^(2)` . How many photons (nearly ) per square metre are incident on the Earth per second ? Assume that the photons in the sunlight have an average wavelength of 550 nm.

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`4xx10^(21)" photons/m"^(2)s`
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NCERT TAMIL-DUAL NATURE OF RADIATION AND MATTER-EXERCISES
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  2. Monochromatic light of wavelength 632.8nm is produced by a helium-neon...

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  9. Light of wavelength 488 nm is produced by an atom laser which is used ...

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  13. What is the de-Broglie wavelength of (a) a bullet of mass 0.040kg trav...

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  14. An electron and a photon each have a wavelength 1.00 nm. Find (i) ...

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  15. A. For what kinetic energy of neutron will the associated de Broglie w...

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  16. Show that the wavelength of electromagnetic radiation is equal to the ...

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  17. What is the de-Broglie wavelength of nitrogen molecule in air at 300K ...

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