UNIT TEST REVIEW EMR Question Preview (ID: 13777)
EMR Test Review.
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What is the unit for frequency?
a) cm/s
b) /s
c) Y
d) ν (nu)
What is the SI unit for frequency?
a) Joules
b) HZ
c) Lambda
d) m/s
Longest wavelength will have
a) low frequency
b) high frequency
c) no frequency
d) steady frequency
Knocking off electron from a metal is called
a) Dual Effect
b) photovoltiac effect
c) photosysynthesis
d) Photoelectric Effect
If electrons in an atom have the lowest possible energies, then it is in
a) Static state
b) Excited state
c) ground state
d) Semi excited state
What is meant by frequency?
a) Oscillation /M
b) Oscillation of waves /s
c) Stationary Waves
d) Oscillation of waves/cm
A line spectrum is produced when an electron moves from higher energy level to a
a) into nucleus
b) Lower one
c) Higher one
d) into proton
Which of the following radiations is not a part of the EM spectrum
a) Gamma Rays
b) Radio waves
c) Beta rays
d) Xrays
What is the equation for calculating a wavelength?
a) E = hv
b) λ = c / ν (nu)
c) (λ) = c/h
d) v= mv
The energy of a photon or quantum is related to its
a) frequency
b) wavelength
c) speed
d) none of the above
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