Radius of dark Newton’s ring formula¶
Newton’s rings are annular interference maxima and minima that appear around the point of contact between a convex lens and a plane—parallel plate when light passes through the lens and plate. When the difference in the path of the beam reflected from the convex surface of the lens at the glass-air boundary and the beam reflected from the plate at the air-glass boundary is equal to an entire wave, then these two waves hit the observation point with the same faces and demonstrate interference.
Links:
- Symbol:
r- Latex:
\(r\)
- Dimension:
length
- wavelength¶
- Symbol:
lambda- Latex:
\(\lambda\)
- Dimension:
length
- ring_order¶
Ring’s order. See
positive_number.
- Symbol:
N- Latex:
\(N\)
- Dimension:
dimensionless
- lens_radius_of_curvature¶
Lens
radius_of_curvature.
- Symbol:
R- Latex:
\(R\)
- Dimension:
length
- medium_refractive_index¶
relative_refractive_indexof the medium between the lens and the plate.
- Symbol:
n- Latex:
\(n\)
- Dimension:
dimensionless
- law¶
r = sqrt(N * R * lambda / n)- Latex:
- \[r = \sqrt{\frac{N R \lambda}{n}}\]