GR 10 PHYSICS

Question 1

Laws of reflection

Answer 1

angle of incidence = angle of reflection

Question 2

Ray Diagrams

Answer 2

show the path of a few important light rays
θi = angle of incidence
θr = angle of reflection
a normal is an imaginary line perpendicular to the point of reflection
when measuring angles, measure from the normal to the light ray

Question 3

transparent

Answer 3

all light in da club!!!

Question 4

translucent

Answer 4

only sum light gets through, with a burry ass image

Question 5

opaque

Answer 5

NO LIGHT GETTING THROUGH!!!

Question 6

visible light

Answer 6

visible light is the portion of the electromagnetic spectrum with wavelengths between 400nm and 700nm
white light is actually composed of ROYGBIV

Question 7

colours

Answer 7

each colour has its on frequencies and wavelengths

red = long, slow wave (low energy)
violet = short, fast wave (high energy)
objects appear coloured due to the wavelengths of light that they reflect
in a vacuum, all wavelengths in white light travel together and are indistinguishable

Question 8

magnification formula

Answer 8

hi/ho = di/do

Question 9

the lens equation

Answer 9

1/f = 1/di + 1/do

Question 10

conduction

Answer 10

transfer of heat by fast particles hitting slower ones, speeding them up
requires a medium

Question 11

convection

Answer 11

as a fluid is heated its particles push further apart and it expands
this reduces the fluids density so it rises, conversely, cooler fluids sink by the opposite process
requires a medium