common question Flashcards
1
Q
how is the size of the mass experimentally determined?
A
this id done by rutherford’s alpha scattering experiment and the distance of closest approach and impact parameter
2
Q
The frequency of X-rays is
A
10^17 - 10^19 Hz
3
Q
Cathode rays can be deflected by
(a) electric field (b) magnetic field
(c) both types of fields (d) none of these fields
A
c both.
4
Q
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?
A
convergingconvex hai bkl
