Theresa Varghese

3 Questions 4 Answers 0 Followers

Questions related from Theresa Varghese

How can we define Power Map for lenses (Intra occular lenses preferably)?

Could someone please let me know what exactly is a power map. My understanding of Power Map is a pictorial represenation of the distribution of the power in a lens radially in case of...

11 March 2020 357 4 View

Why is there a change in EFL measurement in liquid medium?

Hello Everyone, This is regarding the EFL change of a biconvex lens. Can someone explain to me the reason for a change in the measurement of a boconvex lens in water when measured with a time gap...

08 August 2019 7,780 1 View

I want to collimate Na lamp. The light needs to fall on a lens (70 mm). I need to observe the stress birefringence in glass(55X20X4mm).How to proceed?

The whole set up is to observe the stress induced birefringence in glass. Light from the Natrium lamp needs to be collimated. Since the whole experiment is carried out in a normal room, there is...

30 May 2018 9,624 3 View