Write the lens maker’s formula and explain the terms in it. (OR) R

1.	Write the lens maker’s formula and explain the terms in it. (OR) Ravi wants to make a lens. Which formula he has to follow ? Write the formula and explain the terms in it. (OR) Write lens formula.
Answer» Lens maker’s formula: 1/f = (n - 1) (\(\frac {1}{R_1} - \frac {1}{R_2}\)) n = Refractive index of the medium R₁ = Radius of curvature of 1 st surface R₂ = Radius of curvature of 2nd surface f = Focal length

Write the lens maker’s formula and explain the terms in it. (OR) Ravi wants to make a lens. Which formula he has to follow ? Write the formula and explain the terms in it. (OR) Write lens formula.

Answer»

Lens maker’s formula:

1/f = (n - 1) (\(\frac {1}{R_1} - \frac {1}{R_2}\))

n = Refractive index of the medium

R₁ = Radius of curvature of 1 st surface

R₂ = Radius of curvature of 2nd surface

f = Focal length