A plane convex lens of focal length 16 cm, is to be made of glass of refractive index 1.5. The radius of curvature of the curved surface should be :
8 cm
12 cm
24 cm
16 cm

Question

A plane convex lens of focal length 16 cm- is to be made of glass of refractive index 1-5- The radius of curvature of the curved surface should be -8 cm12 cm24 cm16 cm

Toppr Admin · Accepted Answer

1f-x3BC-x2212-1-1R1-x2212-1R2-116-1-5-x2212-1-1R-x2212-1-x221E-x21D2-116-0-5-xD7-1R-x21D2-R-8cm

A plane convex lens of focal length 16 cm, is to be made of glass of refractive index 1.5. The radius of curvature of the curved surface should be :8 cm12 cm24 cm16 cm

1f=(μ−1)[1R1−1R2]116=(1.5−1)[1R−1∞]⇒116=0.5×1R⇒R=8cm

A plane convex lens of focal length 16 cm, is to be made of glass of refractive index 1.5. The radius of curvature of the curved surface should be :
8 cm
12 cm
24 cm
16 cm

$\frac{1}{f} = (μ - 1) [\frac{1}{R_{1}} - \frac{1}{R_{2}}]$

$\frac{1}{16} = (1.5 - 1) [\frac{1}{R} - \frac{1}{\infty}]$

$\Rightarrow \frac{1}{16} = 0.5 \times \frac{1}{R} \Rightarrow R = 8 c m$