quiz Flashcards
In one word, what is it that moves from source to receiver in wave motion?
disturbance
When an elevator is accelerating upward, the frequency of a pendulum inside
increases
The speed of sound depends on
the medium in which it travels
The phenomenon of beats is a result of sound
interference
Sound refraction can occur when the speed of sound
changes
How is the wavelength of light related to its frequency?
inversly proportional
What is the wavelength of a 1-hertz electromagnetic wave?
more than 1 m
In air, radio waves
always travel much faster than sound waves
In free space, electromagnetic waves travel at a
single speed
To “spear” a red fish with a red laser beam and compensate for refraction, aim your laser
directly at the sighted fish
When a light ray in air enters water at 15° from the normal, it
always bends towards the normal
In which material does light travel fastest?
air
Waves spread when passing through openings of various sizes. More spreading occurs for openings that are _________.
narrow
Diffraction is most closely related to
interference
Waves diffract the most when their wavelength is
long
