EM S

What property of electromagnetic waves is measured in Hertz?

• Wavelength

• Speed

• Frequency

• Energy

Which type of electromagnetic wave carries the least energy?

• Gamma rays

• Visible light waves

• X-rays

• Radio waves

What is the range of wavelengths that the human eye can detect?

• 400 to 700 nanometers

• 492 to 577 nanometers

• 1 meter to 1 kilometer

• 1 nanometer to 1 meter

Why do objects appear colored?

• Because they emit their own light

• Due to absorption of all light

• Due to reflection and absorption of specific wavelengths

• Because they are transparent to light

What does NASA's Spitzer Space Telescope help scientists discover?

• New planets in our solar system

• Presence of water and organic molecules in distant galaxies

• The exact size of the Earth

• The temperature on the sun's surface