Wave optics practice · Medium

Ratio of intensities of two waves from slits $S_1$ and $S_2$ is $4: 1$ respectively. Then the ratio of maximum to that of minimum intensities in $YDSE$ is

The rectilinear propagation of light in a medium is due to

Two beams of light will not give rise to an interference pattern, if

Two points, separated by a distance of $\mathrm{0}\mathrm{.1}\,\,\mathrm{mm}$, can just be inspected on a microscope when light of wavelength $6000\,\mathop \mathrm{A}\limits^ \circ$ is used. If the light of wavelength $4800\,\mathop \mathrm{A}\limits^ \circ$ is used, the limit of resolution is

Two waves of amplitude $3 \mathrm{~mm}$ and $2 \mathrm{~mm}$ reach a point in the same phase. The resultant amplitude is

According to Huygens, medium through which light waves travel is

A wave can transmit ………. from one place to another

Unpolarised light incident on transparent glass at incident angle $60^{\circ}$. If reflected ray is completely polarised, then angle of refraction is

In a diffraction pattern due to a single slit of width ‘a’, the first minimum is observed at an angle ${30^\mathrm{o}}$ when light of wavelength 5000 $\mathop \mathrm{A}\limits^\mathrm{o}$ is incident on the slit. The first secondary maximum is observed at an angle of:

A Young's double slit apparatus has slits separated by $0.28 \mathrm{~mm}$ and a screen $48 \mathrm{~cm}$ away from the slits. The whole apparatus is immersed in water and the slits are illuminated by the red light ( $\lambda=700 \mathrm{~nm}$ in vacuum). Find the fringe-width of the pattern formed on the screen.

If the sodium light in Young’s double slit experiment is replaced by red light, the fringe width will

To observe diffraction, the size of an aperture

Two incoherent waves of intensities $I_0$ and $4 I_0$ superimpose at a place. What is resultant intensity at that point?

Resolving power of reflecting type telescope increases with

The phenomenon of interference is shown by

Statement-I: The sound waves do not exhibit the property of polarization.
Statement-II: The sound waves do not have the transverse nature.

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

What is the effect on Fresnel’s biprism experiment when the use of white light is made

In order to see diffraction the thickness of the film is

A parallel monochromatic beam of light is incident normally on a narrow slit. A diffraction pattern is formed on a screen placed perpendicular to the direction of the incident beam. At the first minimum of the diffraction pattern, the phase difference between the rays coming from the two edges of the slit is

In a single slit diffraction experiment first minimum for red light $\left( {660\;nm} \right)$ coincides with first maximum of some other wavelength ${\lambda}$. The value of ${\lambda}$ is

If n represents the order of a half period zone, the area of this zone is approximately proportional to ${n^m}$ where m is equal to

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