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The light radiations with discrete quan...

The light radiations with discrete quantities of energy are called …………

A

photons

B

laser

C

radar

D

photo electron

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The correct Answer is:
A
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MOTION-ATOMIC STRUCTURE -EXERCISE-2 (LEVEL-I)
  1. Which of the following is iso-electronic with neon?

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  2. The approximate size of the nucleus of .28^64 Ni is :

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  3. The light radiations with discrete quantities of energy are called …...

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  4. Radiation of lambda=155 nm was irradiated on Li(work function =5 eV) p...

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  5. The ratio of the energy of a photon of 2000Å wavelength radiation to ...

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  6. Electronmagnetic radiations having lambda=310Åare subjected to a metal...

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  7. A 1-kW radio transmitter operates at a frequency of 880 Hz. How many p...

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  8. If radius of second stationary orbit (in Bohr's atom) is R. Then radiu...

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  9. Radius of Bohr's orbit of hydrogen atom is

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  10. One the basis of Bohr's model, the radius of the 3rd orbit is :

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  11. Ratio of time period of electron in first and second orbit of H-atom w...

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  12. In the Bohr’s model, for unielectronic species following symbols are u...

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  13. The energy of electron is maximum at

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  14. Third line in Balmer series corresponds t o an electron transition bet...

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  15. The shortest wavelength of He^(+) in Balmer series is x. Then longest ...

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  16. An electron in a hydrogen atom in its ground state absorbs energy equa...

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  17. The ratio of difference in wavelengths of 1^(st) and 2^(nd) lines of L...

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  18. The ratio of wavelength of photon corresponding to the alpha-line of L...

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  19. Three energy levels P,Q,R of a certain atom are such that E(P)ltE(Q)lt...

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  20. The value of (n(2)+n(1)) and (n(2)^(2)-n(1)^(2)) for He^(+) ion in at...

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