"भौतिकी के सूत्र" (अनुभाग) सम्पादित करें

== प्रकाश (Light) ==
{| class="wikitable"
|-
|electric light component
|<math>E = E_m sin(kx-\omega t)</math>
|-
|magnetic light component
|<math>B = B_m sin(kx-\omega t)</math>
|-
|[[speed of light]]
|<math>c = 1/\sqrt{\mu_0\epsilon_0} = E/B</math>
|-
|[[Poynting vector]]
|<math>\mathbf{S} = \mu_0^{-1}\mathbf{E}\times\mathbf{B}</math>
|-
|[[Poynting vector]] magnitude
|<math>S = EB/\mu_0 = E^2/c\mu_0</math>
|-
|[[root mean square|rms]] [[electric field]] of light
|<math>E_{rms} = E/\sqrt{2}</math>
|-
|[[irradiance|light intensity]]
|<math>I = E^2_{rms}/c\mu_0</math>
|-
|[[irradiance|light intensity]] at the sphere
|<math>I = P_s/4\pi r^2</math>
|-
|[[radiation momentum]] with total absorption (inelastic)
|<math>\Delta p = \Delta U/c</math>
|-
|[[radiation momentum]] with total reflection (elastic)
|<math>\Delta p = 2 \Delta U/c</math>
|-
|[[radiation pressure]] with total absorption (inelastic)
|<math>p_r = I/c</math>
|-
|[[radiation pressure]] with total reflection (elastic)
|<math>p_r = 2I/c</math>
|-
|[[intensity (physics)|intensity]] from [[polarizing]] unpolarized light
|<math>I = I_0/2</math>
|-
|[[intensity (physics)|intensity]] from [[polarizing]] polarized light
|<math>I = I_0cos^2\theta</math>
|-
|[[index of refraction]] of substance f
|<math>n_f = c/v_f</math>
|-
|[[law of reflection|angle of reflection]]
|<math>\theta_1=\theta_2</math>
|-
|[[law of refraction|angle of refraction]]
|<math>n_1sin\theta_1 = n_2sin\theta_2</math>
|-
|[[critical angle|angle of total reflection]]
|<math>\theta_c = sin^{-1}n_2/n_1</math>
|-
|[[Brewster angle|angle of total polarisation]]
|<math>\theta_B = tan^{-1}n_2/n_1</math>
|-
|[[image]] distance in a [[plane mirror]]
|<math>d_i = -d_o</math>
|-
|[[image]] distance in a [[spherical mirror]]
|<math>n_1/d_o + n_2/d_i = (n_2 - n_1)/r</math>
|-
|[[spherical mirror]] [[focal length]]
|<math>f =r/2</math>
|-
|[[spherical mirror]]
|<math>1/d_o + 1/d_i = 1/f</math>
|-
|[[lateral magnification]] m and h negative when upside down
|<math>m=h_i/h_o = -d_i/d_o</math>
|-
|[[thin lens|lens]] [[focal length]]
|<math>1/f = 1/d_o +1/d_i</math>
|-
|[[lens (optics)|lens]] [[focal length]] from [[refraction]] indexes
|<math>1/f = (n_{lens}/n_{med}-1)(1/r_1 - 1/r_2)</math>
|-
|[[path length difference]]
|<math>\Delta L = d sin\theta</math>
|-
|[[double slit]] minima
|<math>d sin\theta = (N + 1/2)\lambda</math>
|-
|[[double slit]] maxima
|<math>d sin\theta = N\lambda</math>
|-
|[[double-slit]] interference intensity
|<math>I = 4I_0cos^2(\pi d sin\theta / \lambda)</math>
|-
|[[thin-film optics|thin film]] in air minima
|<math>(N + 0/2)\lambda/n_2</math>
|-
|[[thin-film optics|thin film]] in air maxima
|<math>2L = (N + 1/2)\lambda/n_2</math>
|-
|[[single-slit]] minima
|<math>a sin \theta = N\lambda</math>
|-
|[[single-slit]] intensity
|<math>I(\theta)=I_0(sin\alpha/\alpha)^2</math>
|-
|[[double slit]] intensity
|<math>I(\theta) = I_0(cos^2\Beta)(sin\alpha/\alpha)^2</math>
|-
|. . .
|<math>\alpha = \pi a sin\theta/\lambda</math>
|-
|[[circular aperture first minimum]]
|<math>sin\theta = 1.22\lambda/d</math>
|-
|[[Rayleigh's criterion]]
|<math>\theta_R = 1.22\lambda/d</math>
|-
|[[diffraction grating]] maxima lines
|<math>dsin\theta = N\lambda</math>
|-
|[[diffraction grating]] half-width
|<math>\Delta\theta_{hw} = \lambda/Ndcos\theta</math>
|-
|[[diffraction grating]] dispersion
|<math>D=N/d cos\theta</math>
|-
|[[diffraction grating]] resolving power
|<math>R=Nn</math>
|-
|[[diffraction grating]] [[Bragg's law|lattice distance]]
|<math>d = N\lambda/2sin\theta</math>
|-
|}