Ask a Doubt
Request a call back

Join NOW to get access to exclusive study material for best results

CBSE Class 10 Answered

Focal Length of lens A is +10cm & lens B is -5cm. Find combined power 
Asked by akshata.shukla1910 | 13 Aug, 2021, 12:43: PM
answered-by-expert Expert Answer
focal length of lens A  = + 10cm = +0.1 m
focal length of lens B = -5 cm = - 0.05 m 
 
Power of lens A = 1/ f (in metres) = 1/0.1 = + 10 D
Power of lens B = 1/ f = 1/(-0.05) = -20 D
 
Power of lens combined = + 10 + (- 20) = 10 -20 = - 10 D 
Answered by Shiwani Sawant | 13 Aug, 2021, 04:44: PM

Application Videos

Concept Videos

Multiple Choice Questions Practice Test Subjective Questions Webinar Subjective Questions Pre Board Assessment
Answered Unanswered My Questions My Answers
CBSE 10 - Physics
image 1 cm long of object is formed on a screen by convex lens keeping the object and the screen is the lens is moved until a s image is formed on the screen if the image of 0.75 cm long what is the lenght of the object
Asked by udaypratapyadav0001 | 14 Oct, 2021, 08:57: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Physics
Focal Length of lens A is +10cm & lens B is -5cm. Find combined power 
Asked by akshata.shukla1910 | 13 Aug, 2021, 12:43: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Physics
why are telescopes launched in space ? explain in brife about the hubble telescope launched in space
Asked by yashsingh2443 | 01 Aug, 2021, 06:53: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Physics
drop of water bheaves like a
Asked by chandel9807 | 10 Mar, 2021, 11:09: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Physics
what is lens
Asked by shivendralodhi194194 | 26 Jan, 2021, 01:45: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Physics
power of a lens is found to be + 2.5Diopter what kind of lens is it
Asked by rathodveeru41 | 19 Dec, 2020, 10:33: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Physics
power of a lens is found to be + 2.5 Diopter what kind of lens is it
Asked by rathodveeru41 | 18 Dec, 2020, 10:02: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Physics
The radius of curvature of two faces of double convex lens are 10cm,15cm and its focal length is 12cm. Then determine refractive index of lens
Asked by abdibnzubair | 06 Oct, 2020, 12:52: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Physics
why does in case of hypermetropia using a convex lens doesnot affect our far view
Asked by Omkar | 17 Sep, 2020, 06:56: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Physics
 If a spherical lens has a power of, – 0.25 D, the focal length of this lens will be *
Asked by adipadmakarri | 19 Aug, 2020, 09:01: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
My Class Videos Tests ₹ Plans Ask a Doubt

Be a Top Scorer in the Exam with Test Series and Test Generator!

Enrol Now
×