Home
Class 12
PHYSICS
The power of a monochromatic light of fr...

The power of a monochromatic light of frequency `6 xx 10^(14) Hz " is " 2 xx 10^(-3)W`
What is the energy of photon in the light beam?

Text Solution

Verified by Experts

The correct Answer is:
`2.49 eV`
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • QUANTUM THEORY

    CHHAYA PUBLICATION|Exercise Exercise (Hots Numerical Problems)|4 Videos

  • QUANTUM THEORY

    CHHAYA PUBLICATION|Exercise Entrance Corner (Assertion- Reason Type)|10 Videos

  • QUANTUM THEORY

    CHHAYA PUBLICATION|Exercise Exercise (Problem Set- I)|41 Videos

  • OPTICAL INSTRUMENTS

    CHHAYA PUBLICATION|Exercise CBSE SCANNER|8 Videos

  • QUESTION PAPER OF NEET 2017

    CHHAYA PUBLICATION|Exercise QUESTION PAPERS OF (NEET) (2017)|39 Videos

Similar Questions

Explore conceptually related problems

The power of a monochromatic light of frequency 6 xx 10^(14) Hz " is " 2 xx 10^(-3)W On average, how many photons are emitted by the source? Given, h = 6.63 xx 10^(-34)J.s

Monochromatic light of frequency 6.0xx10^(14) Hz is produced by a laser. The power emitted is 2.0 xx10^(-3) W. (a) What is the energy of a photon in the light beam? (b) How many photons per second, on an average, are emitted by the source?

Knowledge Check

  • What is the energy content per photon (J) for light of frequency 4.2xx10^(14)

    A
    `2.8xx10^-21`
    B
    `2.5xx10^-(12)`
    C
    `2.8xx10^-19`
    D
    `2.5xx10^-18`

  • The threshold frequency for a photosensitive metal is 3.3 xx 10^(14) Hz . If a light of frequency 8.2 xx 10^(14)Hz is incident on this metal, the cut-off voltage for the photoelectron emission is nearly.

    A
    1V
    B
    2V
    C
    3V
    D
    5V

    • Similar Questions

    Explore conceptually related problems

    A monochromatic light of frequency 5 xx 10^(14) Hz travels from vacuum to a medium of refraction index 1.5. What will be the wavelength of light in that medium?

    A fraunhofer diffraction pattern is being formed by light wave of frequency 5xx 10^(14) Hz through a slit of width 10^(-2) m . Find the angular width of central maximum [Velocity of light in vacuum = 3xx10^(8) m. s^(-1) ]

    Find the energy of a photon of wavelength 4950 Å in eV ( h = 6.62 xx 10^(-27) erg.s) . What is the momentum of this photon?

    Wavelength of ultraviolet light is 3 xx 10^(-5) cm . What will be the energy of a photon of this light, in eV? (c = 3 xx 10^(10) m.s^(-1))

    Frequency of a photon is 1.2xx10^(15)Hz . Calculate its energy in J.

    The work function of caesium metal is 2.14 ev. When light of frequency 6 xx10^(14)Hz is incident on the metal surface, photoemission of electrons occurs. What is the (a) maximum kinetic energy of the emitted electrons, (b) Stopping potential, and (c) maximum speed of the emitted photoelectrons?

    Home
    Profile