In torches, searchlights and headlights of vehicles the bulb is placed: [1]
A. between the pole and the focus of the reflectors
B. very near to the focus of the reflector
C. between the focus and centre of curvature of the reflector
D. at the centre of curvature of the reflector
Answer:B
In torches, searchlights and headlights of vehicles the bulb is placed: [1]
A. between the pole and the focus of the reflectors B. very near to the focus of the reflector C. between the focus and centre of curvature of the reflector D. at the centre of curvature of the reflector