CBSE Class 12-science Answered
you are given three lenses L1, L2 , L3 each of focal length 15 cm. an object is kept at 20 cm in front of L1 . the final real image is formed at the focus 'I' of L3. find the separations between L1, L2 , L3.?
Asked by thajvirkaur | 05 Mar, 2012, 02:17: PM
Expert Answer
as real image is formed at the focus of L3, so the object for it must be at infinity.
this must be the image for L2.so object for L2 be at focus 15 cm.
now the obj dist for L1 is=20 cm.
image dist will be=60 cm putting in lens formula.
so thge ditance between L1 and L2=75 cm.
the dist between L1 and L2 can be any. or 0.
Answered by | 16 Mar, 2012, 02:33: PM
Concept Videos
-
Reflection by Spherical Mirrors - Part 1
This video explains the types of curved mirrors and few of their uses. -
Laws of refraction
This video covers laws of refraction, about refractive index and some pheno... -
Total internal reflection and its applications ...
This video is based on Total internal reflection, phenomena explained by to... -
Refraction by Lens - Part 1
This video introduces lenses and gives the lens makers formula. -
Refraction and dispersion by prism
This video explains refraction of light and dispersion by prism.
CBSE 12-science - Physics
Asked by sahupranav2006 | 02 Mar, 2024, 03:37: PM
ANSWERED BY EXPERTCBSE 12-science - Physics
Asked by santhoshsindoora | 27 Sep, 2023, 08:26: PM
ANSWERED BY EXPERTCBSE 12-science - Physics
Asked by marvellouskyndiah | 17 May, 2023, 08:07: AM
ANSWERED BY EXPERTCBSE 12-science - Physics
Asked by bmahalik21 | 04 Mar, 2023, 07:03: PM
ANSWERED BY EXPERTCBSE 12-science - Physics
Asked by gazanfarali5782 | 09 Jan, 2023, 03:21: PM
ANSWERED BY EXPERTCBSE 12-science - Physics
Asked by zahirqk | 08 Jan, 2023, 09:50: AM
ANSWERED BY EXPERTCBSE 12-science - Physics
Asked by tannudahiya80536 | 20 Dec, 2022, 01:13: PM
ANSWERED BY EXPERTCBSE 12-science - Physics
Asked by advssdrall | 30 Oct, 2022, 10:06: AM
ANSWERED BY EXPERT
CBSE 12-science - Physics
Asked by arpitarout132 | 29 Apr, 2022, 01:12: AM
ANSWERED BY EXPERT
