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
The surface of a certain planet reflects 80 percent of the light that strikes it. The clouds around the planet then absorb 40 percent of the reflected light. What percent of the light that strikes the planet is reflected from the surface and passes through the clouds without being absorbed?
A 32%
B 40%
C 48%
D 60%
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
The portion of incident radiation (energy) without heating that surface reflected back from a surface of a body is called:
A Streto
B Ironodo
C Albedo
D Thermedo
A machine can produce 10 units in 5 hours. Another machine can produce 5 units in 10 hours. Working together, how many units can they produce in 30 hours?
A 50 units
B 60 units
C 70 units
D 80 units
If B is the flux density, I the length of conductor and v the velocity of conductor, then induced e.m.f. is given by
A Blv
B Blv2
C Bl2v
D Bl2v2
Resistance of an electrical conductor is proportional to its (where, L = length and A = cross-sectional area of the conductor)
A A
B L
C A2
D Both A & B
Which of the following is a good conductor of heat but bad conductor of electricity ?
A Asbestos
B Celluloid
C Straw Board
D Mica
When a current carrying conductor is brought into magnetic field, the force that moves the conductor depends upon
A The value of current
B The weight of the conductor
C The direction of the conductor
D None of the above

Next steps