Where does all the information that we have about the universe come from?
Our understanding of the universe comes from various sources, including observations made through telescopes and other instruments, scientific experiments, mathematical models, and the study of cosmic phenomena.
Light is a ____________________________ and at its most basic, light is a form of ___________________.
Light is a form of electromagnetic radiation, and at its most basic, it is a form of energy.
For light, what is “doing the waving”?
In the context of light, "doing the waving" refers to oscillating electric and magnetic fields that propagate through space.
What do we call light?
Light is often referred to as electromagnetic waves.
The distance between the crests (top) of a wave is called the ______________________________.
The distance between the crests of a wave is called the wavelength.
The _________________________ of light is tied to its __________________________________.
The color (or frequency) of light is tied to its wavelength.
Light with a _______________________ wavelength has more energy. Light with a ___________________ wavelength has less energy.
Light with a shorter wavelength has more energy. Light with a longer wavelength has less energy.
How do our eyes detect different energies of light?
Our eyes have photoreceptor cells that are sensitive to different wavelengths of light. These cells allow us to perceive various colors corresponding to different energies of light.
Violet has a __________________ wavelength and red has a _________________ wavelength.
Violet has a shorter wavelength, and red has a longer wavelength.
The spread of colors, wavelengths, is called a ______________________.
The spread of colors and wavelengths is called a spectrum.
Our eyes detect what kind of light?
Our eyes can detect visible light, which includes the range of wavelengths that we perceive as colors.
What is the light called that is “invisible” to our eyes but has a slightly shorter wavelength than our eyes can see?
The light that is "invisible" to our eyes but has a slightly shorter wavelength than our eyes can see is called ultraviolet (UV) light.
Examples of light with shorter wavelengths than ultraviolet light are ____________________ and _________________________________.
Examples of light with shorter wavelengths than ultraviolet light include X-rays and gamma rays.
What is the light called with slightly longer wavelengths than we can see?
The light with slightly longer wavelengths than we can see is called infrared (IR) light.
Examples of light with longer wavelengths than infrared light are __________________________ and __________________________.
Examples of light with longer wavelengths than infrared light include microwaves and radio waves.
What do we call all of the different kinds of light together?
All the different kinds of light together are part of the electromagnetic spectrum.
Energy goes ____________ when the wavelength gets shorter.
Energy goes up when the wavelength gets shorter.
Ultraviolet light has a ___________________ energy than violet. Gamma rays have the _______________ energy.
Ultraviolet light has higher energy than violet. Gamma rays have the highest energy.
Infrared light has __________________ energy than red light. Radio waves have the _________________ energy.
Infrared light has lower energy than red light. Radio waves have the lowest energy.
Most of the universe is ______________________ to our eyes. We build different kinds of ______________________ to detect the kind of light that our eyes can’t detect.
Most of the universe is invisible to our eyes. We build different kinds of instruments and detectors to detect the kind of light that our eyes can't perceive.
One of the most basic properties of ____________________ is that when you heat it up, it gains __________________. Then it tries to get rid of that energy.
One of the most basic properties of matter is that when you heat it up, it gains thermal energy. Then it tries to get rid of that energy through processes like radiation.