posted by Andy .
Based on what you learned about light, select all of the correct statements from the following list.
The only type of electromagnetic radiation that is actually considered light is visible light.
High frequency photons carry more energy than long wavelength photons.
All electromagnetic waves travel at the speed of light.
Light can act both as a wave and a particle.
Different types of electromagnetic radiation are fundamentally different types of waves.
A photon is a particle of light.
X-rays and gamma rays are long wavelength photons.
what is your thinking?
<< The only type of electromagnetic radiation that is actually considered light is visible light. >>
It depends upon whom you are talking to. The eye can see a bit below 400 nm and a bit above 700 nm, but with rapidly decreasing sensitivity. The fact that "light" is a one-syllable word and "electromagnetic radiation" has ten syllables makes "light" a convenient substitute for other wavelength regions in casual conversation or when talking about the "speed of light".
All electromagnetic wavelengths travel at the speed of light only in a vacuum.