Home › UP Board Class 10 › science › Light - Reflection and Refraction › The distance between the pole and the principal …
The distance between the pole and the principal focus of a spherical mirror is called the:
Aradius of curvature
Baperture
Cobject distance
Dfocal length
Answer & Solution
Correct answer: D. focal length
Focal length is the pole-to-principal-focus distance.
Related questions
A convex lens of focal length 20 cm has an object placed at 30 cm from it. The image distaAn object placed at the focus of a concave mirror produces an image:Total internal reflection occurs when light travels from:The lens formula for a thin lens is:A convex lens of focal length 25 cm has power equal to:Power of a lens of focal length f (in metres) is given by:Snell's law of refraction is:The refractive index of a transparent medium is defined as: