Question

56.
Wavelength is expressed in .....
1) Angstroms
2) Nanometers 3) Picometers 4) All
57.Who disocvered the presence of nucleus in the atom ?
1) Rutherford
2) J.J. Thomson 3) Goldstein
4) Chadwick
58.The product of which of the following is equal to the velocity of light ?
1) Wave length and wave number
2) Wave length and frequency
3) Frequency and wave number
4) Wave length and amplitude
59.The nature of black body is
1) Perfect absorber
2) Perfect emitter
3) both (1) & (2)
4) none of the above
60.The units of frequency is
1) A0
2) Hz
59.
60.
3) cm
4) pm​

Answer 1

Answer:

wavelength is expressed in angstroms.

Nucleus is discovered by Chadwick.

58) 2

59) 1

60) 2