AaD What is Light? Flashcards
What is the Michelson-Morley Experiment? and the results?
done to detect if light needed a luminiferous aether to move in to travel thru space, a light beam was split into 2 seperate beams along perpendicular paths before being recombined, result: no difference in light speed both beams arrived at the detector at the same time.
How did Robert Hooke and Christopher Huygens believe light moved through space?
believed light moved through a hypothetical medium - luminiferous aether
Order these types of electromagnetic radiation from shortest wavelength to longest wavelength. Ultra-violet light, cosmic rays, radio waves, visible light
from shortest to longest → cosmic, UV, visible, radio
the wave theroy of light fails to explain results of which 2 experiments?
michelson-morley experiment & photoelectric effect experiment
quantum theory
the energy of a photon is directly proportional to its frequency and inversely proportional to its wavelength
E (energy of photon) =
hc/Λ h(Plancks constant) c(speed of light) Λ(wavelength fo light)
shadows formed from a point lgiht source
rays emitted from a single point so shadow has sharply defined endges
shadows formed from an extended light source
rays emitted from a larger scale so shadow gradually fades to the periphery (centre-> UMBRA surround-> PENUMBRA)
How did Robert Hooke and Christopher Huygens believe light moved through space?
believed light moved through a hypothetical medium - luminiferous aether
Order these types of electromagnetic radiation from shortest wavelength to longest wavelength. Ultra-violet light, cosmic rays, radio waves, visible light
from shortest to longest → cosmic, UV, visible, radio
photoelectric experiment??
demonstrates that light can cause electrons to be emitted from a material usually metal when it strikes the surface
the wave of light experiment fails to explain which 2 experiments
the michelson-morely experiment and the photoelectric experiment
