3.The fringe width `( beta)`of a diffraction pattern and the slit width 'd' are related as:
(A) `beta prop(1)/(d)`
(B) `beta prop d`
(C) `beta prop sqrt(d)`
(D) `beta prop(1)/(d^(2))`

Angular width (beta) of central maximum of a diffraction pattern on a single slit does not depend upon

The correct curve between fringe width beta and distance between the slits (d) is figure is -

Name the types of interaction or intermolecular forces of which potential energy-distance function are given below (a) Eprop (1)/ (r ) (b) E prop (1)/(r^(2)) (c ) E prop (1)/(r^(3)) (d) E prop (1)/(r^(4)) (e) E prop (1)/(r^(6)) .

At different pressures,the rate of diffusion is expressed by (at constant temperature) (A) r prop sqrt(PM) (B) r prop(P)/(sqrt(M)) (C) r prop(1)/(sqrt(PM)) (D) r prop( P sqrt(M))

Force F and density D are related as F=(alpha)/(beta+sqrtd) , Then find the dimensions of alpha and beta

A particle is projected up an inclined plane of inclination beta at na elevation prop to the horizon. Show that (a) tan prop = cot beta + 2 tan beta , if the particle strikes the plane at right angles (b) tan prop = 2 tan beta , if the particle strikes the plane horizontally.

If cos (alpha+beta)=0 , then sin(alpha-beta) canbe reduced to : (a) cosbeta (b) cos2beta ( c) sinalpha (d) sin2alpha

Prove that : 2tan^(-1)[tan prop//2 tan beta//2]=cos^(-1)[(cos prop +cosbeta)/(1+cosalpha cos beta)]

If alpha and beta are acute angles satisfying cos2 alpha=(3cos2 beta-1)/(3-cos2 beta), then tan alpha=sqrt(2)tan beta (b) (1)/(sqrt(2))tan beta(c)sqrt(2)cot beta(d)(1)/(sqrt(2))cot beta

Light of wavelength lamda is incident on a slit width d. The resulting diffraction pattern is observed on a screen at a distance D. The linear width of the principal maximum is then equal to the width of the slit if D equals