8.26.R - Lesson Review: Sources of Light / Light Interactions

Question 1

A light that is emitted when excited atoms of a solid, liquid, or gas emit photons is called a _________.
fluorescent
filament
laser
neon

Answer 1

laser

Question 2

A thin coil of wire stretched between two thicker wires in an incandescent light bulb is called a ________.
fluorescent
filament
phosphor
laser
neon

Answer 2

filament

Question 3

Light produced when an object gets hot enough to glow is called ___________.
luminous
coherent
laser
fluorescent
transparent
incandescent

Answer 3

incandescent

Question 4

In three to five complete sentences, describe ways lasers are used to help mankind. Remember to use proper grammar and mechanics when writing your sentences.

Answer 4

Your Answer:
Lasers have helped and benefitted humans in many ways. Lasers have helped humans, for example, in wars and surgery, to pinpoint exact locations. We also use barcode scanners for virtually everything these days, from hospitals to grocery stores, and these require lasers.

Question 5

A wave that moves up and down is called a/an ______________ wave.
oriented
transverse
vertical
diffracted

Answer 5

transverse

Question 6

What do we call the change in direction of a light wave as the wave moves around an obstacle or passes through a narrow opening?
refraction
reflection
diffraction
destructive interference

Answer 6

diffraction

Question 7

A disturbance that moves through space and time is called a ________.

Answer 7

wave

Question 8

The maximum distance that the particles of a light wave’s medium vibrate from their rest position is called ___________.
wavelength
interference
amplitude
refraction

Answer 8

amplitude

Question 9

To light something up is to ____________ it.
refract
illuminate
diffract
elongate

Answer 9

illuminate