Light and Optics Flashcards
Formula speed of a wave
λf = v
Formula for energy of a photon
E(photon) = hf = hc/λ
Speed of light
C = 3.0 x 10^8 m/s
Relationship between energy, frequency and wave length
As energy increases, frequency increases and wave length decreases, and vice versa
Angle of incidence is equal to the angle of
Reflection
Snell’s Law of refraction
n1sinθ1 = n2sinθ2
Only angles up to 90 degrees
When moving from a smaller index of refraction (n) to a bigger one your θ
Goes from bigger θ to smaller θ (moves closer to the normal)
Formula for index of refraction
n = c (vac)/v(medium) > 1
How does the frequency of light change from medium to medium
It doesn’t change
Formula for total internal refraction
sinθ (critical) = n2/n1
When no light gets refracted
Dispersion
Index of refraction is different for different wavelengths
Colors from low to high wavelengths
ROYGBIV
When you’re moving from a high n to a low n your angle moves
Away from the normal
Formula for bright fringes
dsinθ = mλ
Formula for dark fringes
dsinθ = (m + 1/2)λ