P6 - Waves Flashcards
What is the period of a wave?
The time taken to complete 1 oscillation (1/f)
True or false? All waves are reflected, transmitted and absorbed.
True
What is equal to the angle of incidence on a reflection diagram?
The angle of reflection
What is a perfect black body?
Something that absorbs all of the radiation going upon it.
List the wave types in the EM spectrum.
Radio, Micro, IR, Vis-light, UV, X-rays, Gamma
Which wave of the EM spectrum has the highest wavelength?
Radio (10^4m)
Which wave has the highest frequency of the EM spectrum?
Gamma
What is the wavelength of gamma rays?
10^-15m
What kind and colour of surface emits and absorbs the most radiation?
Black and matt
() - convex or concave?
Convex
)( - convex or concave?
Concave
What are 3 ways to describe an image?
In terms of enlargement, inverted or upright, real or virtual
If an object is on the same side of the lens as the image, is the image real of virtual?
Virtual
What is the frequency of ultrasound?
20,000Hz+
How do ultrasounds produce images?
The waves are partially reflected by boundaries in between substances of varied densities, and the reflections are timed to produce an image with depth.
