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If lambda(Cu) is the wavelength of K(alp...

If `lambda_(Cu)` is the wavelength of `K_(alpha)` X-ray line of copper (atomic number `29`) and `lambda_(Mo)` is the wavelength of the `K_(alpha)`X-ray line of molybdenum (atomic number `42`),then the ratio `lambda_(Cu)//lambda_(Mo)` is close to

A

`1.99`

B

`2.14`

C

`0.50`

D

`0.48`

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The correct Answer is:
B
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RESNICK AND HALLIDAY-ALL ABOUT ATOMS -PRACTICE QUESTIONS (SINGLE CORRECT CHOICE TYPE)
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  2. Which one of the following statement is WRONG in the context of X- ray...

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  3. If lambda(Cu) is the wavelength of K(alpha) X-ray line of copper (atom...

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  4. A diatomic molecule is made of two masses m(1) and m(2) which are sepa...

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  5. An atom stays in an excited state for about

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  6. The ratio of magnetic field at the center due to the rotation of a Boh...

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  7. With increasing quantum numbers, the energy difference between adjacen...

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  8. If in nature they may not be an element for which the principle quantu...

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  9. An electron has a mass of 9.1 xx 10^(-31)kg. It revolves round the nuc...

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  10. In a beryllium atom, if a(0) be the radius of the first orbit, then th...

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  11. The velocity of an electron in its fifth orbit, if the velocity of an ...

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  12. The number of values of the orbital quantum number associated with the...

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  13. The number of states in a shell with principal quantum number n=3 is

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  14. Of the following states, 5s,3p,4f,5p,4g,3d, and 2p, the one which is N...

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  15. An electron is in a quantum state for which the magnitude of the orbit...

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  16. An electron in an atom is in a state with l=1. The minimum angle (in d...

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  17. The spin angular momentum of an electron is equal to

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  18. The X-ray beam coming from an X-ray tube

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  19. The mimmum wevelength of X-ray that can be produced in a Coolisge tube...

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  20. If the potential difference applied to tube is doubled and the separat...

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