Wave optics practice · Mixed difficulty

In Young’s double slit interference pattern the fringe width

The resolving power of a telescope depends on

Consider the following statements in case of Young’s double slit experiment.
I. A slit S is necessary if we use an ordinary extended source of light.
II. A slit S is not needed if we use an ordinary but well collimated beam of light.
III. A slit S is not needed if we use a spetially coherent source of light.
Which of the above statement are correct?

For the sustained interference of light, the necessary condition is that the two sources should

Refractive index of material is equal to tangent of polarising angle. It is called

Assertion: The phase difference between any two poitns on a wave front is zero.

Reason: Light from the source reaches every point ofthe wave front at the same time.

A light wave is incident normally over a slit of width $24 \times {10^{ - 5}}\;cm$. The angular position of second dark fringe from the central maxima is $30^\circ$. What is the wavelength of light

The wavefront of a distant source of light is of shape

For light diverging from a point source

The total angular width of central maxima in diffraction at a single slit is

Suppose you are using a microscope to view two closely spaced cells. For a given lens diameter, which color of light would you use to achieve the best possible resolving power?

A thin air film is formed by putting the convex surface of a plane-convex lens over a plane glass plate. With monochromatic light, this film gives an interference pattern due to light reflected from the top (convex) surface and the bottom (glass plate) surface of the film.

Statement I : When light reflects from the air-glass plate interface, the reflected wave suffers a phase change of $\pi$.

Statement II : The centre of the interference pattern is dark.

A slit of width ' $a$ ' is illuminated by light of wavelength $6000 A^0$ For What value of 'a will the :- 
(i) First maximum fall at an angle of diffraction of $30^{\circ}$ ? 
(ii) First minimum fall at an angle of diffraction $30^{\circ}$ ?

What should be refractive index of a transparent medium to be invisible in vacuum?

Yellow light is used in single slit diffraction experiment with slit width $\mathrm{0}\mathrm{.6}\;\mathrm{mm}$. If yellow light is replaced by $\mathrm{X}$-rays, then the pattern will reveal that

If a star is moving towards the earth, then the lines are shifted towards

In Fresnel diffraction, if the distance between the disc and the screen is decreased, the intensity of central bright spot will

The resolving power of an astronomical telescope is $\mathrm{0}.\mathrm{2}\,\,\mathrm{seconds}$. If the central half portion of the objective lens is covered, the resolving power will be

A single slit Fraunhoffer diffraction pattern is formed with white light. For what wavelength of light the third secondary maximum in the diffraction pattern coincides with the second secondary maximum in the pattern for red light of wavelength $6500\,\mathop \mathrm{A}\limits^ \circ$

Two coherent sources of light can be obtained by

Statement A: Sharp edge of a fine needle doesn't cast clear shadow.

Statement B: Sharp edge of needle capable to diffract radio wave.

In Young’s double slit experiment we get 60 fringes in the field of view of monochromatic light of wavelength ${4000\;\mathop \mathrm{A}\limits^ \circ }$. If we use monochromatic light of wavelength ${6000\;\mathop \mathrm{A}\limits^ \circ }$, then the number of fringes obtained in the same field of view are

The way the fringe pattern changes when the screen is moved away from the slits is

Through quantum theory of light we can explain a number of phenomena observed with light, it is necessary to retain the wave nature of light to explain the phenomenon of

As a result of interference of two coherent sources of light, energy is

In the following four statements are regarding well defined observable interference pattern.

A) Condition for sustained interference : The two waves should be coherent.

B) Condition for good observation : The separation between light sources should be as small as possible.

C) Condition for good contrast: The amplitudes of interfering waves should be equal (or) at least very nearly equal.

D) Condition for good contrast : Slit width must be very narrow considerably less than the fringe width.

In a diffraction pattern by a wire, on increasing diameter of wire, fringe width

From Brewster's law, except for polished metallic surface, the polarising angle

The maximum number of possible interference maxima for slit separation equal to 2.5 times the wavelength in young's double slit experiment is

What should be refractive index of a transparent medium to be invisible in vacuum?