Related Questions

"An Electromagnetic wave falls on to a boundary between two losses less homogeneous media with different refractive indices, a part of the wave is reflected back to the incident medium and the rest is transmitted on to the second media". This phenomenon is known as:
A Fresnel reflection
B Fresnel refraction
C Snell's law
D None of these
When a wave strikes a vertical breakwater in deep water, it is reflected back and on meeting another advancing wave of similar amplitude merges and rises vertically in a wall of water. This phenomenon is called
A Surf
B Clapotis
C Fetch
D Swell
When a wave is incident from the more dense into a less dense medium at an angle equal to or exceeding the critical angle, the wave suffers total internal __________ .
A Reflection
B Refraction
C Transmission
D None of the above
If ‘Hs’ is the significant wave height, then the average wave height and highest wave height respectively are given by
A 0.6 Hs and 1.67 Hs
B 0.6 Hs and 1.87 Hs
C 1.27 Hs and 1.87 Hs
D 1.27 Hs and 1.67 Hs
The phenomenon of change in direction of light when it passes from one medium to another is called
A Propagation
B Reflection
C Refraction
D Dispersion
When light passes from one medium to another, this phenomenon of change in its direction is called ________
A Refraction
B Diffraction
C Propagation
D No option is correct
The gears are termed as medium velocity gears, if their peripheral velocity is
A 1-3 m/s
B 3-15 m/s
C 15-30 m/s
D 30-50 m/s
A capacitor and a resistor are connected in series to a sine wave generator. The frequency is set so that the capacitive reactance is equal to the resistance and, thus, an equal amount of voltage appears across each component. If the frequency is increased
A VR > VC
B VC > VR
C VR = VC
D VR and VC = 0
An inductor and a resistor are in series with a sine wave voltage source. The frequency is set so that the inductive reactance is equal to the resistance. If the frequency is increased, then
A VR = VL
B VL
C VL = VR
D VL > VR
The velocity of any point in mechanism relative to any other point on the mechanism on velocity polygon is represented by the line
A joining the corresponding points
B perpendicular to line
C at 450 to line
D none of the mentioned

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