Physics
Why does’nt the hydrogen atom emit X-rays?
It is very small in size
It has only one electron
Its energy levels are very close to each other
It is highly electropositive
Its energy levels are very close to each other
For an atom to emit X-rays it should have difference in energy levels.
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A. Electric field on current
B. Magnetic field on magnet
C. Electric field on magnet
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A. Rayleigh scattering
B. Mie scattering
C. Back scattering
D. None of the above
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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
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A. Reflected
B. Refracted
C. Diffracted
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Mach number is used in connection with the speed of
A. sound
B. aircraft
C. spacecraft
D. ships
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