Physics
The different colours of different stars are due to the variation of
Temperature
Pressure
Density
Radiation from them
Temperature
The colour of a star โ which varies from bluish-white and yellow to orange and red โ is primarily due to its composition and effective temperature. And at all times, stars emit light which is a combination of several different wavelengths. On top of that, the colour of a star can change over time.
Temperature The colour of a star โ which varies from bluish-white and yellow to orange and red โ is primarily due to its composition and effective temperature. And at all times, stars emit light which is a combination of several different wavelengths. On top of that, the colour of a star can change over time.
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B. Intensity of Flame
C. Angle
D. Solid Angle
Flemings ”Left hand Rule” is associated with the effect of
A. Electric field on current
B. Magnetic field on magnet
C. Electric field on magnet
D. Magnetic Field on current
The sky appears blue due to
A. Rayleigh scattering
B. Mie scattering
C. Back scattering
D. None of the above
Vehicles use ________ to see the objects coming from behind.
A. Concave lens
B. Convex lens
C. Convex mirror
D. Concave mirror
Which elements are malleable and good conductors of electricity?
A. Tin and silver
B. Iodine and silver
C. Tin and xenon
D. Iodine and xenon
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
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