Light from Objects in the Sky, Part 1

Light from Objects in the Sky, Part 1

By Sherri Christensen

Review of the waves that that come from the universe.... electromagnetic waves

have shorter wavelengths and higher frequency than radio waves​

crest

Multiple Choice

If a wave on a string has a wavelength of 2 m and a frequency of 4 Hz, what is its wave speed?

• 0.5 m/s

• 2 m/s

• 4 m/s

• 8 m/s

Multiple Choice

There are three different strings that have waves with the following properties:

•Wave A: wavelength = 2 m, amplitude = 4 m

•Wave B: wavelength = 4 m, amplitude = 4 m

•Wave C: wavelength = 4 m, amplitude = 2 m

The frequency of all three waves is the same. Which wave has the fastest speed?

• Wave A

• Wave B

• Wave C

• Waves B and C

Multiple Choice

All types of electromagnetic waves, including visible light, are similar except for their wavelengths and frequencies.

• True

• False

Multiple Choice

Radio waves can have wavelengths that are hundreds of meters. Ultraviolet waves have wavelengths that are tens of nanometers. (A nanometer is a billionth of a meter.) Gamma rays have wavelengths that are thousandths of a nanometer. Rank these three types of waves from highest frequency to lowest frequency.

• radio waves, ultraviolet waves, gamma rays

• ultraviolet waves, radio waves, gamma rays

• gamma rays, ultraviolet waves, radio waves

• radio waves, gamma rays, ultraviolet waves

Multiple Choice

Red light has a shorter wavelength than blue light. (ROYGBIV)

• True

• False