A concave lens is placed in contact with a convex lens of focal length 25 cm. The…
Physics · Class 12 · CBSE — Ray Optics & Optical Instruments
A concave lens is placed in contact with a convex lens of focal length 25 cm. The combination produces a real image at a distance of 80 cm, If an object is at a distance of 40 cm, the focal length of concave lens is
- – 400 cm
- – 200 cm
- + 400 cm
- + 200 cm
Answer
(A) – 400 cm
Sign up free on Edukali to view the step-by-step worked solution and practice thousands of similar questions.
Related practice questions
- Two points separated by a distance of 0.1 mm can just be inspected in a microscope when light of wavelength…
- You are given four sources of light each one providing a light of a single colour – red, blue, green and…
- There are certain material developed in laboratories which have a negative refractive index. A ray incident…
- Three immiscible liquids of densities d 1 > d 2 > d 3 and refractive indices μ 1 > μ 2 > μ 3 are put in a…
- Critical angle for light going from medium (i) to (ii) is θ. The speed of light in medium (i) is v , then the…
- A ray of light travelling in a transparent medium of refractive index μ, falls on a surface separating the…
- Two plane mirrors M 1 and M 2 are inclined at angle q as shown in the figure. A ray of light 1, which is…
- A beam of monochromatic light is refracted from vacuum into a medium of refractive index 1 5 . The wavelength…
More Ray Optics & Optical Instruments questions · Browse all practice questions