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Helium-Neon laser discharge tube contains neon
25%
15%
85%
82%
Black Body radiation spectrum is an example of:
None of above
Line spectra
Continuous spectra
Atomic spectra
Charge on an atom is:
Negative
Neutral
None of these
Positive
1 rad =
0.001Gy
0.01Gy
1.01Gy
0.1Gy
The velocity of electron moving is 1st orbit of hydrogen atom is:
2.18 x106 ms-1
2.19 x 106 ms-1
3.18 x106 ms-1
2.09 x 106 ms-1
The series in visible region is:
Paschen series
Pfund series
None of above
Balmer series
1 rem =
0.1 SV
0.01 SV
1.01 SV
0.001 SV
The idea of laser device was first introduced by C.H. Towners and Authers Schowlan is
1913
1965
1958
1972
If the ionization energy of hydrogen atom is 13.6 eV, its ionization potential will be
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