Ask a Question

A doctor has prescribed a corrective lens of power +1.5 D. Find the focal length of the lens.

0 votes
183 views
in Light – Reflection and Refraction by (98.9k points)
edited
A doctor has prescribed a corrective lens of power +1.5 D. Find the focal length of the lens. Is the prescribed lens diverging or converging?

1 Answer

0 votes
by (98.9k points)
selected by
 
Best answer

Power of lens, P= 1/f
P= 1.5D
f= 1/1.5 = 10/15 = 0.66 m
A convex lens has a positive focal length. Hence, it is a convex lens or a converging lens.
 

Related questions

0 votes
1 answer 159 views
Find the power of a concave lens of focal length 2 m.
asked Dec 15, 2021 in Light – Reflection and Refraction by Doubtly (98.9k points)

Doubtly is an online community for engineering students, offering:

  • Free viva questions PDFs
  • Previous year question papers (PYQs)
  • Academic doubt solutions
  • Expert-guided solutions

Get the pro version for free by logging in!

Most popular tags

jeemain geography-10th engineering physics semester 5 web computing

5.7k questions

5.1k answers

108 comments

554 users

Doubtly
...