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A 600 W mercury lamp emits monochrom...

A 600 W mercury lamp emits monochromatic radiation of wavelength 313 .3 nm . How many phtons are emitted from lamp per second ?
`(h= 6.626 xx 10^(34) Js ` velocity of light `3 xx 10^(8) ms^(-1))`

A

`1xx 10^(19)`

B

`1xx 10^(20)`

C

`1xx10^(21)`

D

`1xx10^(22)`

Text Solution

Verified by Experts

The correct Answer is:
C
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Knowledge Check

  • What is the mass of photon having wavelength 3.6 A (h= 6.6 xx 10^(34) kgm^(2) s^(-1) ,c=3 xx 10^(8) ms^(-1))

    A
    `8.212 xx 10^(31) kg`
    B
    `5.687 xx 10^(34) kg`
    C
    `6.135 xx 10^(33) kg`
    D
    `7.256 xx 10^(32) kg`

  • Calculate the energy in corresponding to light of wavelength 45 nm. (Planck’s constant h = 6.63 xx 10^(-34) JS, Speed of light C = 3 xx 10^(8)ms^(-1) )

    A
    `6.67xx10^(15)`
    B
    `6.7xx10^(11)`
    C
    `4.42xx10^(-15)`
    D
    `4.42xx10^(-18)`

  • ………… is the wavelength of photon of energy 35 Kev. h= 6.625 xx 10^(-34)J-s, c= 3 xx 10^(8) m//s, 1eV= 1.6 xx 10^(-19)J

    A
    `3.5 xx 10^(-12) m`
    B
    `35Å`
    C
    3.5 nm
    D
    `3.5Å`

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