Waves, frequency, energy
What is the unit that frequency is measured in?
Hertz or Hz
Light can behave both as a wave and a ____________________
particle
A shadow forms when light is blocked by a ___________ object
solid
How would one measure a wavelength? (from what to what?)
crest to crest
trough to trough
Particles of light are called:
Photons
The darkest part of a shadow where no light reaches is called the:
umbra
As wavelength increases, frequency ______________
decreases
Bees and other animals have the ability to see this high frequency wave that humans cannot
Ultraviolet
the lighter and fuzzy part of the shadow is called the ___________
penumbra
A wave with high amplitude and frequency has _______________ energy
high
lots of
much
Order the following waves from short wavelength to long wavelength:
Infrared, X-rays, Blue Visible Light
X-rays, Blue VL, Infrared
True or False: All shadows have a penumbra
False
*If the light is close enough to the object and/or small enough there will be no penumbra
What type of wave moves UP and DOWN as it travels? (also thought of as perpendicular movement)
Transverse wave
In a vaccuum (or in space), light travels at approximately this speed
300 million m/s
300 000 000 m/s
What would a ray diagram of a solar eclipse look like?
sun, moon, earth
moon shows umbra and penumbra