General Science Physics Optics

Two lens of power -15 D and +5 D are placed in contact co-axially. The focal length of equivalent lens is:

1

10 cm

2

-20 cm

3

-10 cm

4

30 cm

Sponsored

hivanix.in

This quiz is brought to you by hivanix.in

🌐 Web App Development

Other Tools: chatwiz.hivanix.in mmspace.hivanix.in unogame.hivanix.in

Quick Navigation

Home

Subjects

Chapters