Electromagnetic Spectrum and Light

A convex lens is thicker in the center than at its edges

• true

• false

Electromagnetic waves are classified as longitudinal waves.

• true

• false

Electromagnetic waves can transfer energy without a(n)

• medium

• electric field

• magnetic field

• both

In a vacuum, all electromagnetic waves have the same

• wavelength

• frequency

• speed

• amplitude

The electromagnetic waves with the highest frequencies are called

• radio waves

• gamma rays

• x-rays

• visible light

Which electromagnetic waves have the longest wavelengths and lowest frequencies?

• infrared waves

• radio waves

• ultraviolet rays

• gamma rays

Visible light has a higher frequency than

• x-rays

• ultraviolet rays

• infrared rays

• gamma rays

How would a tomato look under a blue light

• It would disappear

• it would still be red

• it would be black

• it would be white

Select all that are true about magenta pigment.

• it reflects yellow light

• it reflects blue and red light

• it absorbs red light

• it absorbs green light

The primary colors of light are

• red, yellow, and blue

• yellow, cyan, and magenta

• red, green, and blue

• every color