(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... View Article
(a) cL (b) L/c (c) c/L (d) 1/Lc Answer: (b) L/c Coherent time = [Coherence length]/[Velocity of light] = L/c
(a) Two different lamps (b) Two different lamps of different power (c) Two different lamps of same power (d) By... View Article
(a) No changes (b) Diffraction pattern becomes narrower (c) Diffraction pattern becomes broader (d) Diffraction pattern disappears Solution: Answer: (b)... View Article
Solution: When a plane wave passes through a convex lens, the refracted wavefront is a converging spherical wavefront.
(a) plane (b) diverging spherical (c) converging spherical (d) none of these Solution: Answer (c) converging spherical
(a) The intensity decreases in proportion for the distance squared (b) The wavefront is parabolic (c) The intensity at the... View Article
Solution: Ordinary light has oscillations in all directions perpendicular to the path of propagation whereas plane polarised light has all... View Article
(a) particle (b) transverse (c) longitudinal (d) dual Solution: (b) Transverse nature of light waves, indicates the direction of oscillation... View Article
(a) Corpuscular nature of light (b) Longitudinal nature of light (c) Quantum nature of light (d) Transverse nature of light... View Article
(a) Light obeys laws of reflection and refraction (b) Light waves get polarised (c) Light shows photoelectric effect (d) Light... View Article
(a) increases (b) decreases (c) remains unchanged (d) none of the above Solution: (c) Distance between two adjacent bright/dark fringes... View Article
(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... View Article
1) 16 2) 8 3) 32 4) 2 Solution: Given log3(log4 (log2 x)) = 0 => log4 (log2 x)... View Article
1) 81 2) 1/81 3) 20 4) 1/20 Solution: We use the following properties in this problem. logb an... View Article
1) 5 2) 25 3) 125 4) none of these Solution: \(\begin{array}{l}7^{2\log _{7}5}\end{array} \) = \(\begin{array}{l}7^{\log _{7}5^{2}}\end{array} \) (since... View Article
1) 0 2) ½ 3) 1 4) 2 Solution: (1/log3 12 + 1/log4 12) = (log 3/log 12) +... View Article
1) 4 loge 3/( loge 7 – loge 6) 2) 4 loge 3/( loge 6 – loge 7) 3) 2... View Article
1) 2 2) 3 3) 5 4) 7 Solution: We use properties loga(m)n = n loga(m) logx x =... View Article
1) ½ (4 log 2 + log a + log b) 2) 0 3) (log 2 + log a +... View Article
