A polarised light of intensity I₀ is passed through another polariser whose pass axis makes an angle of 60⁰ with the pass axis of the former. What is the intensity of emergent polarised light from […]
The angle of incidence at which reflected light is totally polarised for refraction from air to glass (refractive index μ) is
Options
(a) sin⁻¹μ (b) sin⁻¹(1/μ) (c) tan⁻¹(1/μ) (d) tan⁻¹(μ)
Correct Answer:
tan⁻¹(μ)
Colours appear on a thin soap film and soap bubbles due to the phenomenon of
Options
(a) interference (b) scattering (c) diffraction (d) dispersion
Correct Answer:
interference
Explanation:
No explanation available. Be the […]
In the Young’s double slit experiment, the intensity of light at a point on the screen (where the path difference is λ) is K, (λ being the wavelength of light used). The intensity at a […]
Wavefront is the locus of all points, where the particles of the medium vibrate with the same
Options
(a) phase (b) amplitude (c) frequency (d) period
Correct Answer:
phase
Explanation:
On the wave front, […]
To observed diffraction, the size of the obstacle
Options
(a) should be much larger than the wavelength (b) has no relation to wavelength (c) should be of the order of wavelength (d) should […]
The condition for obtaining secondary maxima in the diffraction pattern due to single slit is
Options
(a) a sin θ=nλ/2 (b) a sin θ=(2n-1)λ/2 (c) a sin θ=nλ (d) a sin θ=(2n-1)λ
Correct […]
Find the right condition(s) for Fraunhofer diffraction due to a single slit.
Options
(a) Source is at infinite distance and the incident beam has converged at the slit (b) Source is near to […]
Light of wavelength λ is incident on slit of width d. The resulting diffraction pattern is observed on a screen placed at distance D. The linear width of central maximum is equal to width of […]
In a diffraction pattern due to a singleslit of width a, the first minimum is observed at an angle 30⁰ when light of wavelength 5000Å is incident on the slit. The first secondary maximum is […]
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