Navigate

The equiconvex lens has focal length f. If it is cut perpendicular to the principal

The equiconvex lens has focal length f. If it is cut perpendicular to the principal axis passing through optical centre, then focal length of each half is

Options

(a) f/2
(b) f
(c) 3f/2
(d) 2f

Correct Answer:

2f

Explanation:

When an equiconvex lens is cut parallel to principal axis, then focal length remains the same and when the lens is cut perpendicular to principal axis, then its focal length becomes twice the original.

MH2014
admin:

Related Questions

  1. A parallel plate capacitor with air between the plates has a capacitance of 9 pF.
  2. A spherical body of emissivity e=0.6, placed inside a perfectly black body is maintained
  3. A coil has resistance 30 ohm and inductive reactance 20 ohmn at 50 Hz frequency.
  4. At 10⁰C the value of the density of a fixed mass of an ideal gas divided by its pressure
  5. When temperature of an ideal gas is increased from 27⁰C to 227⁰C,