Flashcards in Chapter 2 7N1 Deck (31):
The bending of light waves when slowing down, entering a denser medium.
Angle of refraction
The angle which is created by light rays when they refract (change direction).
The light ray which is reflected back from the incidence ray at the same angle.
The light ray which is coming from a source (e.g., the Sun).
A substance which can affect a ray's movement by refracting or reflecting it.
Law of Reflection
The angle of incidence and the angle of reflection are equal.
When light rays reflect from a rough surface.
When light rays reflect from a smooth surface.
The extension of a wave.
A source which holds energy (it doesn't hold matter).
Colours which come (as light rays) from a prism and come out as colours.
The splitting up of a light ray due to refraction.
Makes light move closer to each other in a shorter distance.
Makes light move further from each other but still touch.
A layer of cells at the back of the eye for light to refract towards.
A device used to adjust light rays into touching at the retina.
The layer at the front of the eye which is transparent.
Speed of sound
The distance that sound waves travel (340m/s).
The range of frequency humans can hear (20Hz-20,000Hz).
A space with no solid, liquid and gas particles/matter.
PA sound higher than the audible range.
Sound waves reflecting from a hard, smooth object.
A sound going on for a longer period than normal.
How sound is heard with frequency.
When something moves back and forth
The distance/extension of a wave.
The speed of sound waves heard per second.
The distance between two points of waves.
Waves when the waves are perpendicular to the medium.
Waves when the vibration and the direction it moves in are in the same direction.