Posterous theme by Cory Watilo

Do you know your formulae?

 

Do you know your formulae?

28 February 2011

07:14

Unit 3 Formulae

 

Tell the person next to you…

·         All of the formulae from this unit

o    eg. "The formula that links v, f and λ is…"

·         All of the quantities from this unit

o    eg. "λ = Wavelength"

·         All of the units from this unit

o    eg. "The unit of wavelength is metres"

Answers

 

Formulae

 

·         v = f x λ

·         f = 1/T

·         n = sin i / sin r

·         sin c = 1/n

·         v = d / t

 

Quantities and Units

 

·         v = wave speed (m/s)

·         f = frequency (Hertz, Hz)

·         λ = wavelength (m)

·         T = period (s)

·         n = refractive index (no units)

·         i = angle of incidence (o)

·         r = angle of refraction (o)

·         c = critical angle (o)

·         d = distance (m)

·         t = time (s)