Ask a Doubt
Request a call back

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

CBSE Class 12-science Answered

Lens combinations 
question image
Asked by alanpeter9611 | 24 Feb, 2019, 12:52: AM
answered-by-expert Expert Answer
Image formation for various lens is explained in the figure.
 
For the convex lens-1  L1 :  1/v  - 1/u = 1/f  or  1/v + 1/30 = 1/10    or   v = 15 cm,  image v1 is at right side of lens L1  from optical centre of lens-1
                                   (Sign convention   u is -ve  f is +ve )
 
For the plano concave Lens-2  L2 :  image v1 formed by lens-1 is acting as object, this object is at left side at 10 cm distance.
                                                         1/v - 1/u = 1/f  or  1/v + 1/10 = -1/10   or  v = - 5 cm , (sign convention  u is -ve and f is also -ve)
                                                          image v2 is left of lens-2 at adistance 5 cm from optical centre of lens-2
 
For the convex lens-3 L3 : imagev2  formed by lens-2 acts as object. this object is right side of L3 at a distance 5 cm
                                                           1/v-1/u = 1/f   or  1/v+1/5=1/30    or v = -6 cm  , (sign convention   u is -ve and f is +ve)
                                                      image v3 is left of lens-3 at a distance 6 cm from optical centre of lens-3
 
Answered by Thiyagarajan K | 24 Feb, 2019, 10:52: AM

Concept Videos

Multiple Choice Questions Practice Test
Answered Unanswered My Questions My Answers
CBSE 12-science - Physics
What is charge?
Asked by niharvijayvargiya5 | 23 Apr, 2024, 06:40: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Physics
please resolve with good explanation
question image
Asked by kulhariabhijeet | 21 Apr, 2024, 02:39: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Physics
what are ghost particles please answer how is that not able to interact with other subatomic particles ..?is that faster than photons?
Asked by mohapatraswetalina88 | 21 Apr, 2024, 12:18: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Physics
if breakdown voltage of each capacitor is 40v ,then maximum applied voltage Vmax will be
Asked by aishaisha091098 | 19 Apr, 2024, 04:54: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Physics
explain
question image
Asked by ranadeb8090 | 19 Apr, 2024, 03:32: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Physics
solve option e
question image
Asked by dasrituparna1999 | 13 Apr, 2024, 06:56: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Physics
The number of moles in an elemental sample is just the ratio of the mass m to atomic mass 4. n= A The number of protons N, in an elemental sample is Z (atomic number) times the number of moles of Avogadro's number NA N=ZnN P A Copper has an atomic mass of 63.5 g/mole and 29 protons per atom. If such an atom were neutral, then it would have as many protons as electrons. If you remove electrons from a neutral state, then you get a net positive charge. Given a 54 gram ball of copper with a net charge of 2.2 µC, what fraction of the copper's electrons have been removed?
Asked by dasrituparna1999 | 12 Apr, 2024, 09:26: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Physics
which answer is correct and most appropriate with explanation
question image
Asked by mishrigupta19319 | 08 Apr, 2024, 06:28: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Physics
8212
question image
Asked by madhav9119887644 | 07 Apr, 2024, 08:10: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Physics
ans the questions wit reason
question image
Asked by mishrigupta19319 | 07 Apr, 2024, 11:23: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
My Class Videos Tests ₹ Plans Ask a Doubt
Get Latest Study Material for Academic year 24-25 Click here
×