Class 12 > Samacheer Kalvi - English Medium > Ray Optics

  • Choose the correct answer

    The radius of curvature of curved surface at a thin planoconvex lens is 10 cm and the refractive index is 1.5. If the plane surface is silvered, then the focal length will be,


    - (a) 5 cm

    - (b) 10 cm

    - (c) 15 cm

    - (d) 20 cm


1 Answer

  • Correct Answer:

    (b) 10 cm

    Answered on 29/10/2020 at 12:40PM by Thamizh

Download our mobile app - The Learning App by EduDeck

Share

Unit 6. Ray Optics
View all exercises

<< Previous Question

When a biconvex lens of glass having refractive index 1.47 is dipped in a liquid, it acts as a plane sheet of glass. This implies that the liquid must have refractive index,

Next Question >>

An air bubble in glass slab of refractive index 1.5 (near normal incidence) is 5 cm deep when viewed from one surface and 3 cm deep when viewed from the opposite face. The thickness of the slab is,

Latest answers

Answered by Sangeedha

Brasilia Declaration

Global conference

Read More

Answered by Sangeedha

Pollution under control certificate

6 months

Read More

Answered by Sangeedha

Use of _____________in four wheelers and _______for two w...

Seat belt and helmet

Read More

Answered by Sangeedha

Always keep ___________while driving.

To the left

Read More