physics Flashcards
1
Q
reflection
A
angle of incidence = angle of reflection
2
Q
refraction
A
Light slows down in a more optically dense medium
3
Q
total internal reflection
A
all light reflected, happens when i>ic none refracted
4
Q
critical angle =
A
angle of incidence when angle of refraction = 90 degrees
5
Q
dispersion
A
splitting of light into different colours
Reason: different colours (wavelength) experience different refractive index -refracts (bends) at different angles
6
Q
3 types of heat transfer
A
conduction, convection, radiation
7
Q
Transverse wave
A
perpendicular (90 degrees) to travel.
eg: water/light
8
Q
Longitudinal wave
A
wave that oscilates in the same axis as direction of travel.
eg: sound
9
Q
convection takes place
A
only in liquids and gases
