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CEM 141 E2 (1) Questions & 100% Verified Correct Answers with complete solutions (Latest update
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CEM 141 E2 (1) Questions & 100% Verified Correct Answers with complete solutions (Latest update
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CEM 141 E2symbol for wavelength - ANS-λ
symbol for frequency - ANS-v
energy increases as frequency _____ and wavelength _____ - ANS-increases, decreases
when waves interact and the crests and waves reinforce each other - ANS-constructive
interference
when waves interact and create bands of light and dark - ANS-destructive interference
what experiment proved the existence of waves? - ANS-double slit experiment
when a high intensity light is shined on a metal, electrons are emitted - ANS-photo electric effect
what proved light was a particle? how? - ANS-the photo electric effect, light threshold
light from the sun can be split in a prism - ANS-visible spectrum
light from one particular element does not contain all colors of the spectrum, mostly dark with
blips of light - ANS-atomic emission spectrum
a visible spectrum with lines of darkness - ANS-atomic absorption spectrum
who said electrons move in orbits around the nucleus - ANS-Niels Bohr
the energy of atoms are ____ - ANS-quantized
the Bohr model only works for what element? - ANS-hydrogen
when light hits an electron, the photon is absorbed, and the electron jumps to the next orbit level
- ANS-atomic excitation
when an electron ejects a photon and falls to a lower energy level - ANS-atomic de-excitation
what proved electrons acted like waves and how? - ANS-electron double slit experiment,
constructive/destructive interference
you can't measure both the position and momentum of an electron at the same time -
ANS-heisenberg uncertainty principle
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