Wavefront is the locus of all points, where the particles of the medium vibrate with the same:

Huygen’s concept of secondary wave

The fringe width in a Young’s double slit experiment can be increased if we decrease

If Young’s double slit experiment is performed in water keeping the rest of the set-up same, the fringes will

Width of darkand bright fringes in interference is:

What happens, if the monochromaticlight used in Young’s double slit experiment is replaced by white light?

Two sources of light are said to be coherent, when they give light waves of same:

In Young’s double slit experiment, the minimum amplitude is obtained when the phase difference of super-imposing waves is (where n = 1, 2, 3, ...):

If the width of the slit in single slit diffrection experiment is doubled, then the central maximum of diffraction pattern becomes:

In Young’s doubleslit experiment is the slit widths are in the ratio 1: 9, the ratio of theintensity at minima to that at maxima will be:

What happens to theinterference pattern the two slits S₁ and S₂ inYoung’s double experiment are illuminated by two independent but identical sources?

A parallel beam of light of wavelength600 nm is incident normally on a slit of width ‘a’. If the distance between the slits and the screen is 0.8 m and the distance of 2^nd ordermaximum from the centre of the screen is 15 mm, calculate the width of the slit.

In Young's double slit experiment usingmonochromatic light of wavelength 600nm,interference pattern was obtained on a screen kept 1.5m away from the plane of the two slits.  The distance between the two slits, if fringeseparation/fringe width was found to be 1.0mm is:

Light of wavelength 6.5 × 10^–7 m is made incident on two slits 1 mm apart. The distance between third dark fringe and fifth bright fringe on a screen distant 1 m from the slits will be(a) 0.325 mm(b) 0.65 mm(c) 1.625 mm(d) 3.25 mm

Each point of the wavefront is the source of secondary disturbance and the wavelets originating from these points spread out in all directions with the speed of wave, this is called as

a) Principle of superposition

b) Huygens principle

c) Polarisation

d) None

 If the locus of points which have same amplitude and vibrate in same phase are spheres then it is called as

At a large distance from the source, a small portion of the sphere can be considered as a plane then it is called as:

Each point of the wave front is the source of secondary disturbance and the wavelets originating from these points spread out

a) In only one direction

b) In all directions with the speed of wave

c) In all directions

d) None

 When a wave gets refracted into a denser medium the wavelength and speed of propagation decreases but

a) Frequency increases

b) Frequency remains same

c) Frequency also changes

d) None

When the phase difference between the displacement produced by the waves does not change with time then that two sources are called as: