With reference to the lens maker’s formula, answer the following questions: (Understanding) Apply…
Physics20263 marksDerivation
With reference to the lens maker’s formula, answer the following questions: (Understanding)
Given: Formula for refraction at single spherical surface: $\frac{\mu_2}{v} - \frac{\mu_1}{u} = \frac{\mu_2 - \mu_1}{R}$
To show: $\frac{1}{f} = (\mu - 1)\left(\frac{1}{R_1} - \frac{1}{R_2}\right)$
Figure 13
(i)
Apply the formula (expression) of refraction at a single spherical surface to:
(a) refraction at first spherical surface.
(b) refraction at second spherical surface.
(ii)
Combine these two expressions / equations to obtain an expression for focal length of the lens.
