light
When light goes from a substance with a low index of refraction to one with a high index, its speed goes _____
Down
what does EMR stand for?
electromagnetic radiation
In Young's experiment, Light collided with itself, leaving an interference pattern. Peaks met peaks to leave bands of light, and _____ met _____ to create bands of darkness.
Troughs
Gamma rays are an example of a _____ frequency electromagnetic wave.
high
Einstein proposed that light was a ______, as it had both properties of a wave and a particle.
photon
ultraviolet is an example of a _____ frrequency electromagnetic wave.
low
In our eyes, we have 2 types of photoreceptors, rods and cones. Which one helps us perceive colour?
cones
The longer the wavelength the _____ the frequency.
Lower
the electromagnetic spectrum has wavelengths ranging from approximately 2nm to ____ nm
2500
In what year did Young demonstrate that light was a wave with his double slit experiment?
1801
Unlike mechanical waves, electromagnetic waves don't require a ______ to exhibit wave like behaviour.
medium