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Two polarizing plates have polarizing directions parallel so as to transmit maximum intensity of light. Through what angle must either plates be turned if the intensity of the transmitted beam is one third the intensity of incident beam.
Polarizer and analyzer are set with their polarizing directions parallel so that the intensity of transmitted light is maximum. Through what angle should either be turned so that intensity be reduced to (a) 0.5 and 25% of maximum intensity?
A polarizer and analyzer are oriented so that the amount of transmitted light is maximum. Through what angle should either be turned so that the intensity of transmitted light is reduced to (a) 0.75 and (b) 0.25 times the maximum intensity?
A simple pendulum is found to vibrate 50 times within 200 s. When 1.5 m of its length is reduced to a certain length, it vibrates 50 times in 175 s. Find the original length of the pendulum.
Is interference a property of some types of waves only or is it a property of all
types of waves?
A cantilever of length 2 m carries two point loads of 20 KN at the free end and 30 KN at a distance of 1 m from the free end. Find the slope and deflection at free end. Take E= 2×10^5 N/mm^2 and I= 1.5×10^8 mm^4
A beam of uniform rectangular section 100 mm wide and 240 mm deep is simply supported at its ends. It carries a uniformly distributed load of 9.125 KN/m run over the entire span of 4m. Find the deflection at the centre of E= 1.1×10^4 N/mm^2
(a) Figure 33-27 shows light reaching a polarizing sheet whose
polarizing direction is parallel to a y axis. We shall rotate the sheet 40°
clockwise about the light’s indicated line of travel. During this
rotation, does the fraction of the initial light intensity passed by the
sheet increase, decrease, or remain the same if the light is (a) initially
unpolarized, (b) initially polarized parallel to the x axis, and (c)
initially polarized parallel to the y axis?
If the magnetic field of a light wave oscillates parallel to a y axis and is given by By = Bm sin(k z − ωt), (a) in what direction does the wave travel and (b) parallel to which axis does
the associated electric field oscillate?
Draw the reflection rays for the incident rays shown below.include the normal at each point where the incident rays strikes the surface of the mirrors
