The angular dispersion produced by a prism:
Explanation:
If $\mu$ is the average refractive index and A is the angle of prism, then the angular dispersion produced by the prism is given by $\delta=(\mu-1)\text{A}.$
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Using a bar magnet P, a vibration magnetometer has time period 2seconds. When a bar Q (identical to P in mass and size) is placed on top of P, the time period is unchanged. Which of the following statements is true
| (a) Q is of non-magnetic material |
|
(b) Q is a bar magnet identical to P, and its north pole placed on top of P's north pole |
| (c) Q is of unmagnetized ferromagnetic material |
| (d) Nothing can be said about Q's properties |
If the refractive indices of a prism for red, yellow and violet colours be 1.61, 1.63 and 1.65 respectively, then the dispersive power of the prism will be
|
(a) |
(b) |
(c) |
(d) |
A printed page is seen through a glass slab place on it. The printed words appear raised. This is due to:
The work function of a metal is 4.2 eV, its threshold wavelength will be
|
(a) 4000 Å |
(b) 3500 Å |
(c) 2955 Å |
(d) 2500 Å |
Work done by an external agent in separating the parallel plate capacitor is
|
(a) CV |
(b) |
(c) |
(d) None of these |
In Fresnel’s biprism experiment, on increasing the prism angle, fringe width will
|
(a) Increase |
(b) Decrease |
|
(c) Remain unchanged |
(d) Depend on the position of object |
