Chapter 5 Flashcards
Compared to red light, blue light has higher frequency and
higher energy and shorter wavelengths
Why is a sunflower yellow?
it reflects yellow light
radio waves are
a form of light
Compared to an atom as a whole, an atomic nucleus:
is tiny, buy has most of the mass
Some nitrogen atoms have seven neutrons and some have eight neutrons; these two forms of nitrogen are:
isotopes of each other
The set of spectral lines that we see in a star’s spectrum depends on the star’s:
chemical composition
A star whose spectrum peaks in the infrared is
cooler than our sun
A spectral line that appears at a wavelength of 321 nm in the laboratory appears at a wavelength of 328
nm in the spectrum of a distant object. We say that the object’s spectrum is:
redshifted
Which of the following best describes why we say that light is an electromagnetic wave?
The passage of a light wave can cause electrically charged particles to move up and down.
Which of the following statements is true of green grass?
It absorbs red light and reflects green light
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
Cell phone signals passing through walls is an example of
transmission
Suppose you know the frequency of a photon and the speed of light. What else can you determine about the photon
its wavelength and energy
White light hitting white paper is an example of
reflection or scattering
If we say that a material is opaque to ultraviolet light, we mean that it
absorbs ultraviolet light
