Exit Ticket: Unit 2 Part 2 Notes 1 (Properties of Light)

How can light can be described? (choose all that apply):

• particle

• wave

• fractal

Frequency of light is ___ proportional to wavelength.

• directly

• inversely

The portion of the electromagnetic spectrum that humans can see is called:

• radio waves

• visible light

• gamma rays

• x-rays

the distance between peaks of waves is called:

• wavelength

• frequency

• energy

• Planck's Constant

The speed of electromagnetic radiation:

• depends on the form of radiation

• is always approximately

  3 x 10⁸ m/s, regardless of the type

• decreases as distance increases

• is 6.626 x 10^-34 J x s

Which of the following is a unit for frequency?

• Joules

• Hertz

• meters per second

• seconds

A photon (packet of light) with a frequency of

1 x 10¹⁰ Hz is an example of -------- radiation.

• microwave

• infrared

• ultraviolet light

• gamma

Low frequency waves have _________ wavelengths.

• varying

• long

• the same

• short

The wavelength of blue light is 4.1 E-7 m. What is its frequency?

• 7.3 E14 Hz

• 1.2 E2 Hz

• 4.2 E-14 Hz

• 1.4 E-15 Hz

Calculate the energy in Joules of red light having a wavelength of 6.80 E-7 m.

• 2.04 E2 J

• 2.92 E-19 J

• 3.42 E19 J

• 2.04 E-2 J