EM spectrum 2

What is light described as in the text?

• Electromagnetic radiation that acts like both a wave and a particle

• A type of sound

• A form of matter

• Only visible to humans

What determines the energy of a light wave?

• Its color

• Its speed

• Its wavelength and frequency

• Its brightness

What do our retinas detect?

• A very small range of light energy

• Only x-rays

• Only radio waves

• All forms of electromagnetic radiation

What are rods and cones responsible for in our eyes?

• Rods and cones both measure color

• Cones measure brightness and rods determine color

• Rods and cones both measure brightness

• Rods measure brightness and cones determine color

What happens to light that has an energy our retina can't measure?

• It turns into sound

• We can't see it

• It becomes visible light

• It changes color

What kind of light has long wavelengths?

• X-rays

• Blue light

• Radio waves

• Ultraviolet light

How can we detect light outside of the visible range?

• With our eyes, at night

• Using special detectors

• Listening for it

• By feeling the warmth

What is the same about the warmth from a fire and sunlight?

• They can both only be seen at night

• They are both forms of light

• They are both forms of sound

• They are both dangerous

Why do we need special telescopes to see the universe in its full spectrum?

• Because telescopes can only see in visible light

• Because the universe is too far away

• Because it's too dark in space

• Because our eyes can only see visible light

What allows us to study distant stars and galaxies?

• Understanding the physics of light here on Earth

• The fact that light behaves differently in space

• The ability to travel to them

• The color of the light they emit