STANDARD Physics Wave Optics Class 12 Questions

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

The phenomena which is not explained by Huygen's construction of wavefront

In the case of light waves from two coherent sources S₁ and S₂, there will be constructive interference at an arbitrary point P, if the path difference S₁P-S₂P is

For the case given in previous question, which of the following is the path difference for destructive interference?

Two light waves superimposing at the mid-point of the screen are coming from coherent sources of light with phase difference 3π rad. Their amplitudes are 1 cm each. The resultant amplitude at the given point will be

The energies E₁ and E₂ of two radiations are 25 eV and 50 eV respectively. The relation between their wavelengths i.e., λ₁ and λ₂ will be

Two beams of light having intensities I and 4I interfere to produce a fringe pattern on a screen. The phase difference between the beams is π/2 at point A and π at point B. Then the difference between the resultant intensities at A and B is

Light from two coherent sources of the same amplitude A and wavelength λ, illuminates the screen. The intensity of the central maximum is I₀. If the sources were incoherent, the intensity at the same point will be

In Young's double slit experiment two disturbances arriving at a point P have phase difference of π/3. The intensity of this point expressed as a fraction of maximum intensity I₀ is

In Young's double slit experiment using monochromatic light of wavelength λ, the intensity of light at a point on the screen with path difference λ is M units. The intensity of light at a point where path difference is λ/3, is

Two slits in Young's double slit experiment have widths in the ratio 81 : 1. The ratio of the amplitudes of light waves is

In Young's double slit experiment, the ratio of intensities of two coherent sources of light is 9 : 1. The intensities of the used light sources are in ratio

In Young's double slit experiment the ratio intensity of the maxima and minima in the inference experiment is 25 : 9. The ratio of widths of two slits is

In Young's double slit experiment the slits are separated by 0.28 mm and the screen is placed 1.4 m away. The distance between the central and fourth bright fringe is measured to be 1.2 cm. The wavelength of light used in the experiment is

The slits in Young's double slit experiment are illuminated by light of wavelength 6000 Å. If the path difference at the central bright fringe is zero, what is the path difference for light from the slits at the fourth bright fringe?

In Young's double slit experiment, the 10th maximum of wavelength λ₁ is at a distance y₁ from its central maximum and the 5th maximum of wavelength λ₂ is at a distance y₂ from its central maximum. The ratio y₁/y₂ will be

A narrow slit of width 2 mm is illuminated by monochromatic light of wavelength 500 nm. The distance between the first minima on either side on a screen at a distance of 1 m is

The two slits are 1 mm apart from each other and illuminated with a light of wavelength 5 × 10⁻⁷ m. If the distance of the screen is 1 m from the slits, then the distance between third dark fringe and fifth bright fringe is

Young’s experiment is performed with light of wavelength 6000 Å wherein 16 fringes occupy a certain region on the screen. If 24 fringes occupy the same region with another light of wavelength λ, then λ is

Two sources of light of wavelength 2500 Å and 3500 Å are used in Young’s double slit experiment simultaneously. Which orders of fringes of two wavelength patterns coincide?

Compare the energies of two radiations E₁ with wavelength 800 nm and E₂ with wavelength 400 nm

Young’s double slit experiment uses a monochromatic source of light. The shape of interference fringes formed on the screen is

Two slits are made one millimeter apart and the screen is placed one metre away. The fringe separation when blue green light of wavelength 500 nm is used is

In Young's double slit experiment, light waves of wavelength 5.4 × 10² nm and 685 nm are used in turn, keeping the same geometry of the set up. The ratio of the fringe widths in two cases is

In a double slit experiment, the distance between slits is increased ten times whereas their distance from screen is halved then the fringe width is

Yellow light of wavelength 6000 Å produces fringes of width 0.8 mm in Young's double slit experiment. If the source is replaced by another monochromatic source of wavelength 7500 Å and the separation between the slits is doubled then the fringe width becomes

Interference fringes were produced in Young's double slit experiment using light of wavelength 5000 Å. When a film of material 2.5 × 10⁻³ cm thick ' was placed before one of the slits, the fringe pattern shifted by a distance equal to 20 fringe widths. The refractive index of the material of the film is

In a double slit experiment using light of wavelength 600 nm, the angular width of a fringe on a distant screen is 0.1°. The spacing between the two slits is

In Young's double slit experiment distance between two sources is 0.1 mm. The distance of screen from the source is 20 cm. Wavelength of light used is 5460 Å. Then, angular position of the first dark fringe is

In a double slit experiment the angular width of a fringe is found to be 0.2° on a screen placed 1 m away. The wavelength of light used is 600 nm. The angular width of the fringe if entire experimental apparatus is immersed in water, is (Take μ_water = 4/3)

In a Young's double slit experiment, the angular width of a fringe formed on a distant screen is 1°. The slit separation is 0.01 mm. The wavelength of the light is

A screen is placed 50 cm from a single slit which is illuminated with light of wavelength 6000 Å. If the distance between the first and third minima in the diffraction pattern is 3.0 mm. The width of the slit is

A parallel beam of light of wavelength 6000 Å gets diffracted by a single slit of width 0.3 mm. The angular position of the first minima of diffracted light is

A slit of width a is illuminated by white light. The first minimum for red light (λ = 6500 Å) will fall at θ = 30° when a will be

In a single slit diffraction experiment, the width of the slit is made double its original width. Then the central maximum of the diffraction pattern will become

In Young's double slit experiment the distance d between the slits S₁ and S₂ is 1 mm. What should the width of each slit be, so as to obtain 10th maxima of the double slit pattern within the central maximum of the single slit pattern?

In a Fraunhofer diffraction at single slit of width d with incident light of wavelength 5500 Å, the first minimum is observed, at angle 30°. The first secondary maximum is observed at an angle θ =

Transverse nature of light was confirmed by the phenomenon of

A parallel beam of light of wavelength 500 nm falls on a narrow slit and the resulting diffraction pattern is observed on a screen 1 m away. It is observed that the first minima is at a distance of 2.5 mm from the centre of the screen. The width of the slit is

For Young's double slit experiment, two statements are given below: Statement I: If screen is moved away from the plane of slits, angular separation of the fringes remains constant. Statement II: If the monochromatic source is replaced by another monochromatic source of larger wavelength, the angular separation of fringes decreases. In the light of the above statements, choose the correct answer from the options given below:

If the screen is moved away from the plane of the slits in a Young's double slit experiment, then the:

When unpolarised light is incident on a surface at a particular angle of incidence 'i', it is found that the reflected and refracted rays are perpendicular to each other. Which of the following options is correct for this situation?