Angle of incidence is equal to the angle of reflection.
(a) Always
(b) Sometimes
(c) Under special conditions
(d) Never
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For the process to occur under adiabatic conditions, the correct conditions is (i) ΔT = 0 (ii) Δp = 0 (iii) q = 0 (iv) w = 0
The correct conditions is q = 0. So option (iii) is correct.
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Elements with valency 1 are (a) always metals (b) always metalloids (c) either metals or non-metals (d) always non-metals
(c) either metals or non-metals
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Differentiate between regular and diffused reflection. Does diffused reflection mean the failure of the laws of reflection?
Answer: Regular reflection Diffused reflection 1 When all the parallel rays reflected from a plane surface are parallel, the reflection is known as regular reflection When all the parallel rays reflected from a plane surface...
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What is the angle of incidence of a ray if the reflected ray is at an angle of 90° to the incident ray?
As per the laws of reflection The angle of incidence ∠i = angle of reflection ∠r Here as given ∠i + ∠r = 90° ∴ ∠i + ∠i = 90 ° or ∠i =...
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The product of two irrational numbers is (A) always a rational (B) always an irrational (C) one (D) always a non-zero number
Correct answer is (D) always a non-zero number
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The angle of incidence at which reflected light in totally polarized for reflection from air to glass (refractive index n), is
(d) : According to Brewster's law of polarization, n = taniP where ip is angle of incidence Therefore, ip = tan–1(n).
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Light falls from glass (μ= 1.5) to air. Find the angle of incidence for which the angle of deviation is 90°.
Since, μ= 1.5, Critial angle = sin–1(1/μ) = sin–1 (1/1.5) = 41.8° We know, the maximum attainable deviation in refraction is (90° – 41.8°) = 47.2° So, in this case, total internal...
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For reflection through spherical surfaces, the normal at the point of incidence is
(d) perpendicular to the tangent plane at the point of incidence and passes through the centre of curvature.
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The difference between reflection and total internal reflection is that (a) the laws of reflection hold true for reflection
(c) For total internal reflection light ray must travel from optically denser to an optically rarer medium.
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If i = angle of incidence and r = angle of refraction, then
(c) The ratio of the sine of the angle of incidence to the sine of angle of refraction is constant. Remember that the angles of incidence (i) and refraction (r)...
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