Home
Class 12
PHYSICS
Two thin lenses, when in contact, produc...

Two thin lenses, when in contact, produce a combination of power `+10` dioptres. When they are `0.25m` apart, the power is reduced to `+6` dioptres. The power of the lenses in dioptres, are

A

1 and 9

B

2 and 8

C

4 and 6

D

5,5

Text Solution

Verified by Experts

The correct Answer is:
B
`p=p_(1) + p-(2) p.=p_(1)+p_(2) -dp_(1)p_(2)`
Promotional Banner

Topper's Solved these Questions

  • RAY OPTICS AND OPTICAL INSTRAUMENTS

    NARAYNA|Exercise EXERCISE - 1 (C.W)(REFRACTION THROUGH PRISM)|6 Videos

  • RAY OPTICS AND OPTICAL INSTRAUMENTS

    NARAYNA|Exercise EXERCISE - 1 (C.W)(DISPERSION BY A PRISM)|4 Videos

  • RAY OPTICS AND OPTICAL INSTRAUMENTS

    NARAYNA|Exercise EXERCISE - 1 (C.W)(REFRACTION THROUGH SPHERICAL SURFACES)|1 Videos

  • NUCLEI

    NARAYNA|Exercise ASSERTION & REASON|5 Videos

  • SEMI CONDUCTOR DEVICES

    NARAYNA|Exercise Level-II (H.W)|36 Videos

Similar Questions

Explore conceptually related problems

Two thin lenses, when in contact, produce a combination of power +10 diopters. When they are 0.25m apart, the power reduces to +6 diopters. The focal lengths of the lenses are m and "________________" m

Two this lenses, when in contact, produce a combination of power +10 diopters. When they are 0.25 m apart, the power reduces to +6 diopters. The focal length of the lenses are…. m and … m .

Define one dioptre of power of a lens.

One dioptre is the power of a lens of facal length

What is meant by power of a lens ? What is one dioptre ?

The power of a lens being +4 dioptres suggests that it is a

If the power of a lens is 4 dioptres , find its focal length.