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The ratio of the amplitude of the two sources producing interference 3 : 5, the ratio of intensities at maxima and minima is

(a) 25:6 (b) 5:3 (c) 16:1 (d) 25:9 Solution: Answer: (c) 16:1 Amax/Amin =(3+5)/(5-3) = 8/2 Intensity is directly proportional to the... View Article

What is the value of coherent time if L is the coherent length and c is the velocity of light?

(a) cL (b) L/c (c) c/L (d) 1/Lc Answer: (b) L/c Coherent time = [Coherence length]/[Velocity of light] = L/c... View Article

Two coherent source of light can be obtained by

(a) Two different lamps (b) Two different lamps of different power (c) Two different lamps of same power (d) By dividing a wavefront... View Article

How does the diffraction band of blue light look in comparison with the red light?

(a) No changes (b) Diffraction pattern becomes narrower (c) Diffraction pattern becomes broader (d) Diffraction pattern disappears Solution:... View Article

What is the geometrical shape of the wavefront when a plane wave passes through a convex lens?

Solution: When a plane wave passes through a convex lens, the refracted wavefront is a converging spherical wavefront.... View Article

A plane wave passes through a convex lens. The geometrical shape of the wavefront that emerges is

(a) plane (b) diverging spherical (c) converging spherical (d) none of these Solution: Answer (c) converging spherical... View Article

Which of the following is correct for light diverging from a point source?

(a) The intensity decreases in proportion for the distance squared (b) The wavefront is parabolic (c) The intensity at the wavelength does not... View Article

How does ordinary light differ from plane polarised light?

Solution: Ordinary light has oscillations in all directions perpendicular to the path of propagation whereas plane polarised light has all... View Article

The phenomenon of polarization shows that light has ________ nature.

(a) particle (b) transverse (c) longitudinal (d) dual Solution: (b) Transverse nature of light waves, indicates the direction of oscillation... View Article

Polarisation of light proves the

(a) Corpuscular nature of light (b) Longitudinal nature of light (c) Quantum nature of light (d) Transverse nature of light Solution: (d)... View Article

Which one of the following properties of light does not support wave theory of light?

(a) Light obeys laws of reflection and refraction (b) Light waves get polarised (c) Light shows photoelectric effect (d) Light shows... View Article

In Young’s double slit experiment, the slit width and the distance of slits from the screen both are doubled. The fringe width

(a) increases (b) decreases (c) remains unchanged (d) none of the above Solution: (c) Distance between two adjacent bright/dark fringes is... View Article

A beam of light of wavelength 600 nm from a distance source falls on a single slit 1 mm wide and a resulting diffraction pattern is observed on a screen 2 m away. The distance between the first dark fringes on either side of central bright fringe is

(a) 1.2 cm (b) 1.2 mm (c) 2.4 mm (d) 2.4 cm Solution: (c) 2.4 mm For dark fringe to form, dy/D = λ or y = Dλ/d = [2x600x10-9]/[10-3] = 1.2... View Article

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Archives

The ratio of the amplitude of the two sources producing interference 3 : 5, the ratio of intensities at maxima and minima is

What is the value of coherent time if L is the coherent length and c is the velocity of light?

Two coherent source of light can be obtained by

How does the diffraction band of blue light look in comparison with the red light?

What is the geometrical shape of the wavefront when a plane wave passes through a convex lens?

A plane wave passes through a convex lens. The geometrical shape of the wavefront that emerges is

Which of the following is correct for light diverging from a point source?

How does ordinary light differ from plane polarised light?

The phenomenon of polarization shows that light has ________ nature.

Polarisation of light proves the

Which one of the following properties of light does not support wave theory of light?

In Young’s double slit experiment, the slit width and the distance of slits from the screen both are doubled. The fringe width

A beam of light of wavelength 600 nm from a distance source falls on a single slit 1 mm wide and a resulting diffraction pattern is observed on a screen 2 m away. The distance between the first dark fringes on either side of central bright fringe is

If log₃(log₄ (log₂ x)) = 0, then the value of x is

The value of [latex](0.05)^{log _{sqrt{20}}(0.1+0.01+0.001+…)}[/latex]

[latex]7^{2log _{7}5}[/latex] is equal to

The value of (1/log₃ 12 + 1/log₄ 12) is

If 2^x.3^x+4 = 7^x, then x =

If A = log₂ log₂ log₄ 256 + 2 log_√2 2, then A is equal to

If a² + 4b² = 12ab, then log(a + 2b) is

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