Chapter 5
T/F The greater the wavelength of light, the greater its energy.
False
From shortest to longest wavelength, which of the following correctly orders the different categories of electromagnetic radiation?
Gamma rays, X rays, ultraviolet, visible light, infrared, radio.
Which forms of light are lower in energy and frequency than the light that our eyes can see?
Infrared and radio.
Why is a sunflower yellow?
It reflects yellow light.
From lowest energy to highest energy, which of the following correctly orders the different categories of electromagnetic radiation?
Radio, infrared, visible light, ultraviolet, X rays, gamma rays.
You observe the same spectral line in two stars that are identical in every way except that one rotates faster than the other. How does the spectral line differ between the two?
The line in the faster rotating star is broader.
From laboratory measurements, we know that a particular spectral line formed by hydrogen appears at a wavelength of 121.6 nanometers (nm). The spectrum of a particular star shows the same hydrogen line appearing at a wavelength of 121.8 nm. What can we conclude?
The star is moving away from us.
When white light passes through a cool cloud of gas, we see
an absorption line spectrum.
Compared to red light, blue light has higher frequency and
higher energy and shorter wavelength than red light.
Thermal radiation is defined as
radiation that depends only on the emitting object's temperature.
The wavelength of a wave is
the distance between two adjacent peaks of the wave.
