physics equations

• how do you change g/m to kg/m

  /1000
• inverse square law

  I=k/R squared

  work out k to work out I

  k=I x R squared

  I= intensity

  k= constant

  R = distance
• speed of wave in a string

  V= square root T/u

  v= speed of wave in sting

  T=tention

  u=kg/m

  important‼️

  if u is in g/m change to kg/m
• calculate the critical angle

  sinC = 1/n

  sinC= critical angle

  n= refractive index

  c= sin-1 (1/n)
• how to find refractive index of glass/water

  n= sin (I) / sin (R)

  n= refractive index

  I = light entering

  R = angle of refraction
• how to find refractive index

  n= c/v

  n= refractive index

  c= light in air

  v = light in glass
• what is v= f x weird symbol

  v= wave speed

  f= frequency

  weird symbol = wavelength