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The de - Broglie wavelength of an electr...

The de - Broglie wavelength of an electron having `80 ev` of energy is nearly
`( 1eV = 1.6 xx 10^(-19) J`, Mass of electron ` = 9 xx 10^(-31) kg` Plank's constant ` = 6.6 xx 10^(-34) J - sec`)

A

`140 A^(0)`

B

`0.14 A^(0)`

C

`14 A^(0)`

D

`1.4 A^(0)`

Text Solution

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`lambda=(h)/(sqrt(2mE))`
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What is the approximate value of the de broglie wavelength of an electron having 80 eV of electron ? (1eV = 1.6xx10^(-19) J " mass of electron " = 9xx10^(-31) kg, " Plank's constant " = 6.6xx10^(-34) J-sec)

The de-Broglie wavelength of an electron having 80 eV of energy is nearly ( 1 eV = 1.6 xx 10 J-sec Plank's constant = 6.6 xx 10 J-sec )

The de-Broglie wavelength of an electron is 600 nm . The velocity of the electron is: (h = 6.6 xx 10^(-34) J "sec", m = 9.0 xx 10^(-31) kg)

The de broglie wavelength of an electron moving with a speed of 6.6xx10^5 m//s is of the order of (h=6.6xx10^(-34) Js " and " m_e = 9xx10^(-31) kg)

The de-Broglie wavelength of an electron is 66 nm. The velocity of the electron is [h= 6.6 xx 10^(-34) kg m^(2)s^(-1), m=9.0 xx 10^(-31) kg]

Find the de-Broglie wavelength of an electron in a metal at 127^@C . Given, mass of electron =9.11xx10^(-31)kg , Boltsmann constant =1.38xx10^(-23)"J mole"^-1K^-1 , Plank constant =6.63xx10^(-34)Js .

The de Brogile wavelength of an electron (mass =1 xx 10^(-30) kg, charge = 1.6 xx 10^(-19)C) with a kinetic energy of 200 eV is (Planck's constant = 6.6 xx 10^(-34) Js)

The kinetic energy of an electron is 4.55 xx 10^(-25)J . Calculate the wavelength . [h = 6.6 xx 10^(-34)Js , mass of electron = 9.1 xx 10^(-31)kg]

Find de-Broglie wavelength of electron with KE =9.6xx10^(-19)J .

Calculate the wavelength associated with a moving electron having kinetic energy of 1.375 xx 10^(-25) J . (mass of e = 9.1 xx 10^(-31) kg, h = 6.63 xx 10^(-34) kg m^2 s^(-1)) .

NARAYNA-DUAL NATURE OF RADIATION AND MATTER-EXERCISE - 1 (H.W)
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  2. Threshold wavelength for a metal having work function w(0) is lambda. ...

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

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  5. An AIR station is broadcasting the waves of wavelength 300 metres. If ...

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  6. The energy of a photon is E = hv and the momentum of photon p = (h)/(l...

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  7. The approximate wavelength of a photon of energy 2.48 eV is

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  8. An important spetral emission line has a wavelength of 21 cm. The corr...

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  9. A particle having a de Broglie wavelength of 1.0 A^(0) is associated w...

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  10. The de - Broglie wavelength of an electron having 80 ev of energy is n...

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  11. Electrons are accelerated through a p.d. Of 150V. Given m=9.1xx10^(-31...

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  12. If accelerating potential of an alpha particle is doubled than its new...

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  13. The ratio of the deBroglie wavelengths of proton, deuteron and alpha p...

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  14. The energy that should be added to an electron, to reduce its de-Brogl...

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  15. The de - Broglie wavelength of an electron having 80 ev of energy is n...

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  16. If particles are moving with same velocity , then maximum de - Broglie...

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  17. The wavelength of most energetic X-rays emitted when a metal target is...

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  18. X - rays which can penetrate through longer distances in substance are...

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  19. An X - ray machine has an accelerating potential difference of 25,000 ...

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  20. Four the production of X-rays of wavelength 0.1 Å the minimum potentia...

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