To produce a parallel beam of light from a concave mirror, the distance at a...
PHYSICS
JAMB 1994
To produce a parallel beam of light from a concave mirror, the distance at a which the lamp should be placed from the mirror is equal to
- A. the focal length
- B. two times the focal length
- C. the distance of the image
- D. two times the radius of curvature
Correct Answer: A. the focal length
Post an Explanation Or Report an Error
If you see any wrong question or answer, please leave a comment below and we'll take a look. If you doubt why the selected answer is correct or need additional more details? Please drop a comment or Contact us directly. Your email address will not be published. Required fields are marked *