Physics
Vehicles use ________ to see the objects coming from behind.
Concave lens
Convex lens
Convex mirror
Concave mirror
Convex mirror
Convex mirror is used as a rear view mirror in the vehicles because convex mirror always forms virtual, erect and diminished images irrespective of distance of the object. A convex mirror enables a driver to view large area of the traffic behind him.
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A. Electric field on current
B. Magnetic field on magnet
C. Electric field on magnet
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The sky appears blue due to
A. Rayleigh scattering
B. Mie scattering
C. Back scattering
D. None of the above
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A. Tin and silver
B. Iodine and silver
C. Tin and xenon
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The colour of the ocean appears to be blue because the sunlight falling on it is
A. Reflected
B. Refracted
C. Diffracted
D. Scattered
Mach number is used in connection with the speed of
A. sound
B. aircraft
C. spacecraft
D. ships
The device which converts AC to DC is
A. Oscillator
B. Amplifier
C. Rectifier
D. None of these
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