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Find the ratio of de Broglie wavelength ...

Find the ratio of de Broglie wavelength of molecules of hydrogen and helium which are at temperatures `27^(@)C` and `127^(@)C` respectively

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Since, `lamda=(h)/(mv)=(h)/(sqrt(3mkT))`
`(lamda_(H))/(lamda_(He))=sqrt((m_(He)T_(He))/(m_(H)T_(H)))=sqrt((8)/(3))`
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AAKASH SERIES-DUAL NATURE OF RADIATION AND MATTER-PRACTICE EXERCISEX
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  2. Two separate monochromatic light beams A and B of the same intensity a...

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  3. The K.E of the electron is E when the incident wavelength is lamda. To...

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  4. Two sources A and B have same power. The wavelength of radiation of A ...

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  5. The photo electric threshold wavelength for a metal is 2750A^(@), The ...

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  6. When the incident wavelengths are lamda and lamda//2 the kinetic energ...

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  7. A 1000W transmitter works at a frequency 880 kHz. The number of photon...

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  8. The threshold wavelength for photo electric emission from a material i...

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  9. Light of wavelength 4000A^(@) is incident on a potassium surface whose...

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  10. Monochromatic light incident on a metal surface emits electron with K....

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  11. Three metals have work functions in the ratio 2 3:4. Graphs are drawn ...

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  12. Two photons of energies twice and thrice the work function of a metal ...

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  13. The work function of a substance is 4eV. The longest wavelength of lig...

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  14. The photo electric work function of a metal is 1 eV. Light of wave len...

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  15. When a mono chromatic point source of light is at a distance of 0.2m f...

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  16. The work function of a substance is 12.4 eV. The longest wavelength of...

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  17. A surface irradiated with light of wave length 480 nm gives out electr...

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  18. The photoelectric threshold wavelength for a certain metal is 4000A^(@...

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  19. What P.D. must be applied to stop the fastest photo electron emitted b...

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  20. The threshold frequency for photo electric effect for a metal surface ...

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  21. The work functions of metals A and B are in the ratio 1 : 2. If light ...

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