Wave Optics Questions

In the Young′s double slit experiment using a monochromatic light of wavelength λ, the path difference (in terms of an integer n) corresponding to any point having half the peak intensity i...

A parallel beam of fast moving electrons is incident normally on a narrow slit. A fluorescent screen is placed at a large distance from the slit. If the speed of the electrons is increased, which of t...

In Young′s double slit experiment, the slits are 2 mm apart and are illuminated by photons of two wavelengths λ1 = 12000 and λ2 = 10000. At what minimum distance from the common centra...

Two beams, A and B, of plane polarized light with mutually perpendicular planes of polarization are seen through a polaroid. From the position when the beam A has maximum intensity (and beam B has zer...

In a Young′s double slit experiment the intensity at a point where the path difference is (λ being the wavelength of the light used) is I. If I0 denotes the maximum intensity, is equal to...

Light with an energy flux of 25 × 104 Wm-2 falls ona perfectly reflecting surface at normal incidence. If the surface area is 15 cm2, the average force exerted on the surface is...

A beam of light of λ = 600 nm from a distant source falls on a single slit 1 mm wide and the resulting diffraction pattern is observed on a screen 2 m away. The distance between first dark fringe...

In Young′s double slit experiment, the interference bright fringes are of :

In Young′s experiment, monochromatic light through a single slit S is used to illuminate the two slits S1 and S2. Interference fringes are obtained on a screen. The fringe width is found to be w...

In a double slit experiment, the two slits are 1 mm apart and the screen is placed 1 m away. A monochromatic light of wavelength 500 nm is used. What will be the width of each slit for obtaining ten m...

For a parallel beam of monochromatic light of wavelength ′λ′, diffraction is produced by a single slit whose width ′a′ is of the order of the wavelength of the light. If &...

In a diffraction pattern due to a single slit of width ‘a’, the first minimum is observed at an angle 30o whenlight of wavelength 5000 Aois incident on the slit. The first secondary maximu...

The angular width of the central maximum in a single slit diffraction pattern is 60°. The width of the slit is 1 μm. The slit is illuminated by monochromatic plane waves. If another slit of s...

A beam of unpolarised light of intensity Io is passed through a polaroid A and then through another polaroid B which is oriented so that its principal plane makes an angle of 45o relative to that of A...

Two coherent point sources S1 and S2 are separated by a small distance ′d′ as shown. The fringes obtained on the screen will be :...

The graph between angle of deviation (δ) and angle of incidence (i) for a triangular prism is represented by :-

In Young′s double slit experiment, one of theslit is wider than other, so that the amplitude ofthe light from one slit is double of that fromother slit. If Im be the maximum intensity, theresult...

A police car with a siren of frequency 8 kHz is moving with uniform velocity 36 km/hr towards a tall building which reflects the sound waves. The speed of sound in air is 320 m/s. The frequency of the...

A light ray travelling in glass medium is incident on glass-air interface at an angle of incidence θ. The reflected (R) and transmitted (T) intensities, both as function of q, are plotted. The co...

A train moving at a speed of 220 ms-1 towards a stationary object, emits a sound of frequency 1000Hz. Some of the sound reaching the object gets reflected black to the train as echo. The frequencyof t...