Easy
Where should the light source (bulb) be placed in the reflector of a searchlight or torch so that the light rays travel over a long distance?
- AAt the center of curvature
- BBeyond the center of curvature
- CAt the principal focus
- DBetween the principal focus and the center of curvature
Explore More
Similar Questions
How are power and focal length of a lens related? You are provided with two lenses of focal length $20\, cm$ and $40\, cm$ respectively. Which lens will you use to obtain more convergent light?
Medium
View Solution$A$ convex mirror always forms a virtual and erect image.
Easy
View SolutionWhat happens when a light ray incident normally on the surface of a glass slab enters from air into the glass?
Easy
View SolutionIf the absolute refractive indices of water and glass are $\frac{4}{3}$ and $\frac{3}{2}$ respectively,then what will be the ratio of the velocity of light in water to that of glass?
Easy
View SolutionWhat is the minimum number of rays required for locating the image formed by a concave mirror for an object? Draw a ray diagram to show the formation of a virtual image by a concave mirror.
Medium
View SolutionVedclass Products
For Students
Vedclass Test Series
Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.
Start Free TrialFor Teachers
Exam Paper Generator
Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.
Try FreeFor Institutes
Online Exam Module
Live online exams with unlimited students, 360° analytics & white-label branding.
See Demo