![A glass plate 0.9cm thick has a reflective index of 1.50. How long does it take for a pulse of light to pass through the plate [c = 3.0 x 10^8 ms‾¹]](https://erudites.ng/wp-content/uploads/2020/06/past-questions-and-answers.jpg)
by Sunday | Nov 11 | Physics JAMB
A. 4.5 x 10-11s B. 4.5 x 10-10s C. 4 .5 x 10-12s D. 3.0 x 10-10s Correct Answer: Option C = 4 .5 x 10-12s Explanation N = 1.5 = (speed of light in glass)/speed of light in air (1.5)/1 = (3.0 x 108)/V V = (3.0 x 108)/1.5 V = 2.0 x 108 ms-1 But x = Vt t = (x)/Vt t =...
by Sunday | Nov 11 | Physics JAMB
A. periscope B. sextant C. episcope D. kaleidoscope Correct Answer: Option D = kaleidoscope
by Sunday | Nov 11 | Physics JAMB
A. diffraction B. refraction C. reflection D. polarization Correct Answer: Option A = diffraction
by Sunday | Nov 11 | Physics JAMB
A. Increase the reverberation of sound in the hall B. increase the amount of echo in the hall C. reduce the hight of the ceiling from the floor D. reduce the reverberation of sound in the hall Correct Answer: Option D = reduce the reverberation of sound in the hall...
by Sunday | Nov 11 | Physics JAMB
I. They should be identical II. They should originate from the same source. III. They should be coherent. IV. They should be monochromatic. A. I,II and III only B. I, III and IV only C. II, III and IV only D. I, II, III and IV Correct Answer: Option B – I, III...
by Sunday | Nov 11 | Physics JAMB
A. handle is a better conductor of heat than the blade B. handle contains stored energy in form of heat C. blade is a better conductor of heat than the handle D. blade is placed at a lower temperature than the heat Correct Answer: Option C = blade is a better...
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