Wave Basics
The transfer of this is the main thing a wave does.
Energy
Sound is produced when something does this.
Vibrates
Light is a type of this.
Electromagnetic Wave
A lens that is thicker in the middle than at the edges.
Convex
The part of the electromagnetic spectrum that humans can see.
Visible light
The highest point of a transverse wave.
Crest
A sound wave with a greater amplitude is perceived as
Louder
The approximate speed of light in a vacuum.
300 000 km/second
A concave lens causes parallel light rays to do this.
Diverge
The colour of visible light with the longest wavelength.
Red
A wave has 5 complete cycles passing a point every second. Its frequency is...?
5 Hz
Which generally carries sound faster: air, water or steel?
Steel
The line drawn perpendicular to a surface at the point where light hits it.
Normal
The scientific name for short-sightedness.
Myopia
Red light + green light produces what colour?
Yellow
A wave has a frequency of 4 Hz. How many complete waves pass a point in 10 seconds?
40 waves
If the amplitude of a sound wave increases but its frequency stays the same, what happens to its pitch?
Nothing
Light bends when it enters a different medium because its ______ changes.
Speed
Why does a convex lens help someone with hyperopia?
It begins converging the light before it enters the eye, helping the focal point move forward onto the retina.
A person has difficulty distinguishing red and green, but can see blue normally. Which type/s of photoreceptor is likely still functioning normally?
The blue-sensitive cones.
If you double the frequency of a wave while keeping its speed constant, what happens to its wavelength?
It halves
When sound travels from one medium into another, does its frequency change?
No - the frequency is determined by the source.
Light enters glass from air at an angle. Does it bend towards or away from the normal?
Towards the normal
Why might a person squint when they can't see something clearly in the distance?
Squinting reduces the amount of light entering the eye and narrows the range of angles that light rays can enter from. This blocks some of the more extreme-angle rays, leaving a narrower bundle of rays that can produce a sharper image.
A blue object is placed under red light. What colour will it appear?
Dark/black