Light Energy, the Eye and the Electromagnetic Spectrum

Unlike mechanical waves, electromagnetic waves can travel through....

• a vacuum
  (empty space)
• water
• the ground
• air

An object seen through translucent material appears less clear than one seen through transparent material because the translucent material....

• transmits none of the light coming from the object.
• reflects all the light coming from the object.
• transmits all of the light coming from the object.
• diffuses (spreads out) some of the light coming from the object.

Light can be....

• transmitted.
• reflected.
• absorbed.
• all of the above.

An object appears red because it....

• reflects light waves of all colors.
• reflects light waves of red.
• absorbs light waves of red.
• transmits light waves of all colors.

What is the only portion of the electromagnetic spectrum that we can see with our eyes?

• Microwaves
• Infrared Light
• Visible Light
• Ultraviolet Light

How do colors differ from one another?

• Different colors have different wavelengths.
• Different colors have different amplitudes.
• Different colors are made from different energy sources.
• Different colors are found in different sections of the electromagnetic spectrum.

What portion of the electromagnetic spectrum is given off as heat?

• Infrared light.
• Visible light.
• Ultraviolet light.
• Gamma rays.

Which structure refracts the bulk of the light that enters our eyes?

• The iris.
• The pupil.
• The cornea.
• The retina.

Which eye structure is covered by rods and cones -- cells specially designed to respond to light and colors?

• The iris.
• The pupil.
• The cornea.
• The retina.

When visible light is absorbed by an object, it is converted into....

• invisible light.
• heat energy.
• scattered energy.
• nothing -- light energy that is absorbed is simply destroyed.