common question

Question 1

how is the size of the mass experimentally determined?

Answer 1

this id done by rutherford’s alpha scattering experiment and the distance of closest approach and impact parameter

Question 2

The frequency of X-rays is

Answer 2

10^17 - 10^19 Hz

Question 3

Cathode rays can be deflected by
(a) electric field (b) magnetic field
(c) both types of fields (d) none of these fields

Answer 3

c both.

Question 4

A concave lens of refractive index 1.5 is immersed in a medium of refractive index 1.65 what is
the nature of the lens?

Answer 4

convergingconvex hai bkl