Recent questions

by ayush dekate asked Aug 1, 2021 0 views

The condition for minima in Fraunhofer diffraction for single slit is asinθ = mλWhat is ‘θ’? A. Angle of incidence of incident rays at the slit B. Angle at which diffracted rays strikes the screen C. Angle between slit and screen D. Angle of diffraction at which rays are diffracted at slit
Answer : D. Angle of diffraction at which rays are diffracted at slit...

by ayush dekate asked Aug 1, 2021 0 views

In Fraunhofer diffraction pattern for single slit, a central maximum is obtained when angle of diffraction q is equal to zero. What it actually indicates? A. All the diffracted rays are parallel and focused ... are diffracted by the slit in all the directions D. The rays are reflected by the slit
Answer : A. All the diffracted rays are parallel and focused by slit at a single point on screen...

by ayush dekate asked Aug 1, 2021 0 views

Which of the following condition is essential for observing Fraunhofer diffraction? A. Source must be close to slit and screen should be at infinite distance B. Both source and screen must be close to ... infinity and screen should be close to the slit D. Both source and screen must be at infinity
Answer : D. Both source and screen must be at infinity...

by ayush dekate asked Aug 1, 2021 0 views

In reference with antireflection coating which of the following statement is true? A. Thickness of the film should be changed for light of same wavelength but different intensity B. Thickness of ... D. Thickness of the film should be decreased for light of same wavelength but higher intensity
Answer : B. Thickness of the film need not be changed for light of same wavelength but different intensity...

by ayush dekate asked Aug 1, 2021 0 views

What should be the relation between refractive indices for antireflection coating made over a glass surface? A. Bair > Bfilm > Bglass B. Bair < Bfilm < Bglass C. Bair > Bfilm < Bglass D. Bair < Bfilm > Bglass
Answer : B. Bair < Bfilm < Bglass...

by ayush dekate asked Aug 1, 2021 0 views

Antireflection coating is helps in which case of the following? A. Minimizing the reflection of light from top surface B. To absorb and control the amount of light entering into the medium C. To allow maximum light to reflect from top surface D. To allow minimum light to enter into the medium
Answer : A. Minimizing the reflection of light from top surface...

by ayush dekate asked Aug 1, 2021 0 views

Why in Newton’s rings the center spot is always dark? A. The thickness of the film is zero at center B. The path difference between incident ray and reflected ray is ½wavelength C. The incident ray and reflected ray undergo destructive interference D. All of above
Answer : D. All of above...

by ayush dekate asked Aug 1, 2021 1 view

In Newton’s rings experiment, if we reduce the radius of curvature of Plano convex lens to zero, what will be effect on Newton’s rings? A. They will become brighter B. They will become darker C. They will disappear D. They will be more dense
Answer : C. They will disappear...

by ayush dekate asked Aug 1, 2021 1 view

What is the nature of interference pattern for thin film of wedge shaped A. Concave outside B. Convex outside C. Equally spaced D. Concave inside
Answer : B. Convex outside...

by ayush dekate asked Aug 1, 2021 0 views

A wedge shaped thin has A. Non-uniform thickness B. Zero thickness at one end and it increasing towards other end C. Zero thickness at both ends D. Thickness increase and decrease alternately
Answer : B. Zero thickness at one end and it increasing towards other end...

by ayush dekate asked Aug 1, 2021 0 views

A thin film having thickness t
Answer : C. Black...

by ayush dekate asked Aug 1, 2021 0 views

When a light wave suffers reflection at the interface between air and glass medium, the change of phase of the reflected wave in air is equal to A. 0 B. π C.2 π D.π /2
Answer : B. π...

by ayush dekate asked Aug 1, 2021 0 views

Interference in thin film is mainly because of A. Division amplitude B. Division of wave fronts C. Addition of amplitude D. Addition of wave fronts
Answer : A. Division amplitude...

by ayush dekate asked Aug 1, 2021 0 views

Diffraction is special type of __________. A. Reflection B. Refraction C. Interference D. Polarization
Answer : B. Refraction...

by ayush dekate asked Aug 1, 2021 0 views

here are two types of diffraction Fresnel and __________. A. Michelson B. De Broglie C. Fraunhofer D. Huygens
Answer : C. Fraunhofer...

by ayush dekate asked Aug 1, 2021 0 views

When Newton’s rings interference pattern is viewed from above by means of reflected light, the central spot is __________. A. Dark B. Multi colored C. Bright D. None of these
Answer : A. Dark...

by ayush dekate asked Aug 1, 2021 0 views

.If we narrow the distance between two slits in Young’s experiment the fringes width __________. A. Increases B. Decreases C. Remains same D. becomes zero
Answer : B. Decreases...

by ayush dekate asked Aug 1, 2021 0 views

.Fringe spacing is defined as the distance between two Consecutive __________. A. Crests B. Bright fringes only C. Dark fringes only D. Bright or dark fringes
Answer : A. Crests...

by ayush dekate asked Aug 1, 2021 0 views

__________ of the following phenomenon cannot be explained on the particle nature of light. A. Photo Electric Effect B. Compton’s Effect C. Pair Production D. Interference
Answer : A. Photo Electric Effect...

by ayush dekate asked Aug 1, 2021 0 views

The path difference corresponding to a phase difference of π radian is __________. A.2λ B .λ/2 C .λ /4 D. λ
Answer : B .λ/2...