Home
Class 12
PHYSICS
We may state that the energy E of a phot...

We may state that the energy E of a photon of frequency `nu` is `E =hnu`, where h is a plank's constant. The momentum p of a photon is `p=h//lambda` where `lambda` is the wavelength of the photon. From the above statement one may conclude that the wave velocity of light is equal to

A

`3xx10^(8)ms^(-1)`

B

`(E )/(p)`

C

`Ep`

D

`((E )/(p))^(2)`

Text Solution

Verified by Experts

The correct Answer is:
B
`C= lambda.v=(h)/(p).(E)/(h)=(E)/(P)`
Promotional Banner

Topper's Solved these Questions

  • ATOMIC PHYSICS

    RESONANCE ENGLISH|Exercise Exercise (2) Only one option correct type|30 Videos

  • ATOMIC PHYSICS

    RESONANCE ENGLISH|Exercise Exercise-2 part-II Single and double value integer type|12 Videos

  • ATOMIC PHYSICS

    RESONANCE ENGLISH|Exercise Exercise 1 Part-1 subjective questions|35 Videos

  • ALTERNATING CURRENT

    RESONANCE ENGLISH|Exercise HIGH LEVEL PROBLEMS|11 Videos

  • CAPACITANCE

    RESONANCE ENGLISH|Exercise High Level Problems|16 Videos

Similar Questions

Explore conceptually related problems

If the enrgy of a frequency v is gives by E = hv where h is plank's constant and the momentum of photon is p = h//lambda where lambda is the wavelength of photon , then the velocity of light is equal to

Photon is quantum of radiation with energy E =hv where v is frequency and h is Planck's constant. The dimensions of h are the same as that of

The relation between the "energy" E and the frequency v of a photon is repressed by the equation E = hv , where h is plank's constant Write down its dimensions.

What is the momentum (p) of photon from ultraviolet light of wavelength lambda= 332 nm.

Find the dimensions of Planck's constant h from the equatioin E=hv where E is the energy and v is the frequency.

The energy of a photon is equal to the kinetic energy of a proton. The energy of the photon is E. Let lambda_1 be the de-Broglie wavelength of the proton and lambda_2 be the wavelength of the photon. The ratio (lambda_1)/(lambda_2) is proportional to (a) E^0 (b) E^(1//2) (c ) E^(-1) (d) E^(-2)

Light in certain cases may be considered as a stream of paerticles called photons. Each photon has a linear momentum h/lamda where h is the Planck's constant and lamda is the wavelength lamda is incident on a plane mirror at an angle of incidene theta . Calculate the change in the linear momentum of a photon as the beam is reflected by the mirror.

If the energy of the photon is (2 lambda_(p)mc)/(h) times the kinetic energy of the electron then show then the wavelength lambda of photon and the de Broglie wavelength of an electron have the same value (Where m, c and h have their usual meanings .)

The wavelength lambda of a photon and the de-Broglie wavelength of an electron have the same value. Show that the energy of the photon is (2 lambda mc)/h times the kinetic energy of the electron, Where m,c and h have their usual meanings.

Let p and E denote the linear momentum and energy of a photon. If the wavelength is decreased,

RESONANCE ENGLISH-ATOMIC PHYSICS-Exercise ( Part II : Only one one correct type)
  1. The maximum kinetic energy of photoelectrons emitted from a surface wh...

    Text Solution

    |

  2. A photon of light enters a block of glass after travelling through vac...

    Text Solution

    |

  3. We may state that the energy E of a photon of frequency nu is E =hnu, ...

    Text Solution

    |

  4. The de- Broglie wavelength of an electron moving with a velocity 1.5xx...

    Text Solution

    |

  5. A partical of mass M at rest decays into two Particles of masses m1 ...

    Text Solution

    |

  6. Let p and E denote the linear momentum and the energy of photon. For a...

    Text Solution

    |

  7. The de-Broglie wavelength of a neutron corresponding to root mean squa...

    Text Solution

    |

  8. The wavelength lambda of de Broglie waves associated with an electron ...

    Text Solution

    |

  9. The orbital speed of the electron in the ground state of hydrogen is v...

    Text Solution

    |

  10. The total energy of an electron in the first excited state of hydrogen...

    Text Solution

    |

  11. In above Q., the potential energy of the electron is:

    Text Solution

    |

  12. If a(0) is the Bohr radius, the radius of then n=2 electronic orbit in...

    Text Solution

    |

  13. Ionisation energy of a hydrogen-like ion A is greater than that of ano...

    Text Solution

    |

  14. Which energy state of doubly ionized lithium Li^(++) has the same ener...

    Text Solution

    |

  15. In Bohr's model of hydrogen atom a(0) is the radius of the ground stat...

    Text Solution

    |

  16. If an orbital electron of the hydrogen atom jumps from the ground stat...

    Text Solution

    |

  17. In the Bohr model of the hydrogen atom, the ratio of the kinetic energ...

    Text Solution

    |

  18. The innermost orbit of the hydrogen atom has a diameter of 1.06Å what ...

    Text Solution

    |

  19. Three photons coming from excited atomic-hydrogen sample are picked up...

    Text Solution

    |

  20. The transition from the state n = 4 " to " n = 3 in a hydrogen like at...

    Text Solution

    |