In Young’s double slit experiment, if the separation between coherent sources is halved and the distance of the screen from the coherent sources is doubled, then the fringe width becomes :

 [NEET 2020] (a) double (b) half (c) four times (d) one-fourth

LIGHT WITH AN AVERAGE FLUX OF 20 W/m^2 FALLS ON A NON-REFLECTING SURFACE AT NORMAL INCIDENCE HAVING SURFACE AREA 20 m^2. THE ENERGY RECEIVED BY THE SURFACE DURING TIME SPAN OF 1 MINUTE IS :

                             

A RAY IS INCIDENT AT AN ANGLE OF INCIDENCE I ON ONE SURFACE OF A SMALL ANGLE PRISM (WITH ANGLE OF PRISM A) AND EMERGES NORMALLY FROM THE OPPOSITE SURFACE. IF THE REFRACTIVE INDEX OF THE MATERIAL OF THE PRISM IS μ, THEN THE ANGLE OF INCIDENCE IS NEARLY EQUAL TO

NEET 2020 a) \[\frac{A}{2\mu}\] b) \[\frac{2A}{\mu}\] c)\[{\mu A}\] d)\[\frac{\mu A}{2}\] Diagram: A RAY IS EMERGES NORMALLY FROM ENERGENT S...

THE BREWSTER’S ANGLE IB FOR AN INTERFACE SHOULD BE

(a) 0° < i b <30° (b) 30° < i b <45° (c) 45° < i b <90° (d) i b = 90°   Brewster’s law: