Light (Q2)

the distance between two identical points of a light wave is called...

a wavelength

for light waves traveling in a vacuum, which of the following is TRUE

all light waves travel at the same speed

each element produces a unique line spectrum because...

atoms of each element have a unique set of energy levels

electrons move from higher energy levels to lower energy levels and produce light in this process

emission

when electrons in an atom move from higher to lower energy levels, light is

emitted

the number of waves in a given amount of time is called the

frequency

which of the following lists light waves from highest to lowest energy

gamma rays, visible, radio waves

which of these devices is used primarily to cause dispersion of light waves

grating

the relationship between wavelength and frequency is...

inverse

the distance light travels in one minute is called...

light-minute

the distance light travels in once second is called

light-second

the following lists light waves from longest to shortest wavelengths...

red, yellow, blue

in a lens, a light beam slows down and bends. this process is called...

refraction

"Mommy! Daddy! Why is the sky blue? "Because particles in the atmosphere are the right size to cause this to blue wavelength light"

scattering

if you see the line emissions spectrum from a star, expecting to measure a red line, a green line, and a blue line, but instead you measure an infrared line, a yellow line, and a green line with the same spacing, what is a possible hypothesis for why you see this?

the star is moving away from you

if you see the line emissions spectrum from a star, expecting to measure a red line, a green line, and a blue line, but instead you measure an orange line, a blue line, and a violet line with the same spacing, what is a possible hypothesis for why you see this?

the star is moving towards you