Lesson -- Properties of Light

Multiple Choice

Which two terms describe the dual nature of light?

• particle and solid

• wave and flat line

• transverse and longitudinal

• wave and particle

Multiple Choice

What is the symbol for the speed of light in a vacuum?

• c

• s

• m/s

• f

Multiple Choice

emitting light

• luminous

• intensity

• illuminated

• reflecting

Multiple Choice

a particle of light

• shadow

• reflection

• photon

• prism

Multiple Choice

What happens during a solar eclipse?

• the sun's shadow falls on the moon

• the moon's shadow falls on earth

• the earth's shadow falls on the moon

• the sun's shadow falls on the earth

Multiple Choice

What happens during a lunar eclipse?

• the earth's shadow falls on the moon

• the moon's shadow falls on the earth

• the sun's shadow falls on the moon

• the sun's shadow falls on the earth

Multiple Choice

Why don't we have solar eclipses more often?

• The moon's orbit is tilted relative to earth's orbital plane

• Earth's axis is tilted to allow light to fall at an angle

Multiple Choice

Intensity refers to --

• angle of reflection

• radius

• brightness

• illumination

Multiple Choice

What does the P represent in the equation?

• photon

• pressure

• power

• momentum

Draw

At radius 2r, what is the surface area that the light passes through? Draw your answer on the screen.

Multiple Choice

Light intensity _____ as the inverse square of the distance.

• increases

• decreases

Multiple Choice

What is the light intensity if the surface moves 5m from the source?

• 1/5

• 5

• 1/25