In a double slit interference pattern, the first maxima for infrared light would be
(a) at the same place as the first maxima for green light
(b) closer to the centre than the first maxima for green light
(c) farther from the centre than the first maxima for green light
(d) infrared light does not produce an interference pattern
(a) at the same place as the first maxima for green light
(b) closer to the centre than the first maxima for green light
(c) farther from the centre than the first maxima for green light
(d) infrared light does not produce an interference pattern
(c) farther from the centre than the first maxima for green light
In a double slit interference pattern, the first maxima for infrared light would be
a. at the same place as the first maxima for green light
b. closer to the centre than the first maxima for green light
c. farther from the centre than the first maxima for green light
d. infrared light does not produce an interference pattern
A double slit interference experiment is carried out in air and the entire arrangement is dipped in water. The fringe width
(a) increases
(b) decreases
(c) remains unchanged.
(d) fringe pattern disappears
An optically active compound
(a) rotates the plane of polarised light
(b) changes the direction of polarised light
(c) does not allow plane polarised light to pass through
(d) none of these
To obtain a sustained interference pattern we require two sources which emit radiation of
(A) the same frequency
(B) nearly same frequency
(C) the same frequency having a definite phase relationship
(D) different wavelengths
In double –slit experiment the distance of the second dark fringe from the central line is 3 mm. The distance of the fourth bright fringe from the central line is
(A) 6 mm
(B) 8mm
(C) 12 mm
(D) 16 mm
An optically active compound
(a) rotates the plane of polarised light.
(b) changes the direction of polarised light.
(c) does not allow plane polarised light to pass through.
(d) none of these.
To observe diffraction, the size of the obstacle
(a) should be X/2, where X is the wavelength.
(b) should be of the order of wavelength.
(c) has no relation to wavelength.
(d) should be much larger than the wavelength.
A resistance of R Ω draws current from a potentiometer. The potentiometer has a total resistance \(R_0\) Ω as shown in the Fig below. A voltage V is supplied to the potentiometer. Derive an expression for the voltage across R when the sliding contact is in the middle of the potentiometer.
In the phenomena of Diffraction of light when the violet light is used in the experiment is used instead of red light then.
(a) Fringe width increases.
(b) No change in fridge width.
(c) Fringe width decreases.
(d) Colour pattern is formed.
A conducting loop of area 5.0 cm² is placed in a magnetic field which varies sinusoidally with time as B=0.2 sin300t. The normal to the coil makes an angle of 60° with the field. The emf induced at t=(π/900)s
(a) 7.5 × 10⁻³ V
(b) Zero
(c) 15 × 10⁻³ V
(d) 20 × 10⁻³ V
Unit of magnetic dipole moment is
a) ampere meter
b) ampere/meter⁻¹
c) ampere metre²
d) ampere/metre²
Two point charges, \(q_1\) = 10 × \(10^{-8}\)C, \(q_2\) = -2 × \(10^{-8}\)C are seperated by a distance of 60 cm in air what is the electrostatic potential energy of the system.
1) 3 joule
2) -3 joule
3) -3 x\(10^{-5}\) joule
4) 3 x\(10^{-5}\) joule
what is the angle between an electric dipole moment and then electric field strength due to it on its equatorial line?
(A) \(0^\circ\)
(B) \(90^\circ\)
(C) \(180^\circ\)
(D) None of these
Bending of Light phenomena is shown by
(a) Polarization
(b) Diffraction
(c) Interference
(d) Dispersion