Register

What will be the focal lenght of a combined lens made by contact of two lenses of power +3D and -2D.​

What will be the focal lenght of a combined lens made by contact of two lenses of power +3D and -2D.​
asked 8.9k views
3 votes
what will be the focal lenght of a combined lens made by contact of two lenses of power +3D and -2D.​

asked
User Jon Koeter
by
8.5k points

1 Answer

2 votes
  • P_1=+3D
  • P_2=-2D


\\ \bull\tt\dashrightarrow P=P_1+P_2


\\ \bull\tt\dashrightarrow P=+3D-2D=+1D

Now


\\ \bull\tt\dashrightarrow f=(1)/(P)


\\ \bull\tt\dashrightarrow f=(1)/(1)


\\ \bull\tt\dashrightarrow f=1m

answered
User HexBlit
by
7.9k points
← Prev Question Next Question →

Related questions

User Nolabel
asked Feb 18, 2022 24.0k views
what will be the focal lenght of a combined lens made by contact of two lenses of power +3D and -2D.​
Nolabel asked Feb 18, 2022
by Nolabel
7.9k points
1 answer
4 votes
24.0k views
Ask a Question
Welcome to Qamnty — a place to ask, share, and grow together. Join our community and get real answers from real people.

Categories

Other Questions

Physical properties of minerals graphic organizer
A snowball is launched horizontally from the top of a building at v = 16.9 m/s. If it lands d = 44 meters from the bottom, how high (in m) was the building?
What type of rock is the Haystack rock (igneous, Metamorphic, or Sedimentary)
Link Copied!