Light Waves & Spectra

The color of emitted light with the LONGEST wavelength is

• violet

• green

• red

• indigo

The color of emitted light with the SHORTEST wavelength is

• violet

• green

• red

• indigo

Which is TRUE of light waves?

• They are not electromagnetic waves

• They need a medium to travel through

• The are made up compressions and rarefactions

• They are transverse waves

Light does not need a substance to travel through

• True

• False

Which of these describes how light travels through an empty space?

• It travels straight but may change direction to avoid objects.
• It changes direction often even if there are no objects. 
• It comes to a stop after it travels a certain distance. 
• It travels in a straight line without stopping. 

What is the distance from crest to crest or trough to trough of any given wave?

• Wavelength

• Crest Length

• Photon

• Trough Length

The electromagnetic waves with the longest wavelengths and lowest frequencies are

• radio waves.

• infrared rays.

• X-rays.

• gammy rays.

The lowest part of the wave is?

• crest
• trough
• rarefaction
• wavelength

The highest point on a wave

• trough
• amplitude
• crest
• wavelength

The larger the amplitude, the less energy

• true

• false