397 questions across 1 question group — pick any mix to generate a Physics paper with step-by-step answer keys.
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The Young's experiment is performed with the lights of blue (λ = 4360 Å) and green colour (λ = 5460 Å), If the distance of the 4th fringe from the centre is x, then
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(a) x (Blue) = x (Green) |
(b) x (Blue) > x (Green) |
(c) x (Blue) < x (Green) |
(d) |
The figure shows a double slit experiment P and Q are the slits. The path lengths PX and QX are nλ and (n+2)λ respectively, where n is a whole number and λ is the wavelength. Taking the central fringe as zero, what is formed at X
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(a) First brigh |
(b) First dark |
(c) Second bright |
(d) Second dark |
Two coherent sources have intensity in the ratio of 
. Ratio of (intensity) max/(intensity) min is
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(a) |
(b) |
(c) |
(d) |
The oscillating electric and magnetic vectors of an electromagnetic wave are oriented along
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(a) The same direction but differ in phase by 90° |
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(b) The same direction and are in phase |
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(c) Mutually perpendicular directions and are in phase |
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(d) Mutually perpendicular directions and differ in phase by 90° |
Specific rotation of sugar solution is 0.01 SI units. 200 
of impure sugar solution is taken in a polarimeter tube of length 0.25m and an optical rotation of 0.4rad is observed. The percentage of purity of sugar is the sample is
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(a) 80% |
(b) 89% |
(c) 11% |
(d) 20% |
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