Science, asked by kajal5952, 4 months ago

A concave lens has a focal length 20 cm
Calculate its power.
please explain properly

Answers

Answered by akankshapadave2004

0

Answer:

thanks for points bro.

Answered by sujathavin

1

Answer: P=- 5D

Explanation:

given : f=-20 cm
we know p=100/f [when f is in cm]
p=100/-20= -5D[dioptre]

Previous Question

Next Question

Similar questions

Social Sciences, 2 months ago

Why are loan facility not accessible to all ?

Political Science, 2 months ago

f) Mention four types of psychology.

Chemistry, 2 months ago

determine the pressure change when a constant volume of gas at 1.50 atm is heated from 20 degrees to 30 degrees...

Math, 4 months ago

Find the sum to n terms of the series 5+55+555…… ...

English, 4 months ago

7 A spaceship travels at the rate of 4210 km/hr. Express in scientific notation the time it will take to cover 3350 km...

Physics, 9 months ago

What are N- type semiconductors? How they are formed ?

Science, 9 months ago

(i) How will you show experimentally that metals are good conductor of heat?(ii) Describe the extraction of Mercury metal from its ore Cinnabar (HgS)...

Physics, 9 months ago

focal length of convex lens is 50 cm .if an object is kept at a distance of 75 cm.find image distance and magnification...