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