Answer to Question #297171 in Optics for Kell

Question

An object of height 19.7 cm is placed 23.6 cm from a convex lens. What is the angular size of this object?

Answer 1

Answer

Radius of lens

R=2f=$2*23.6=47.2cm$

Height of object h = 19.7cm

So angular size of object

$=\frac{Arc}{radius}\\=\frac{19.7}{47.2}\\=0.42$