Question:medium
Two lenses one biconvex and other plano concave have same magnitude of power. The refractive indices of their materials are 1.5 and 1.7 respectively. If the radii of curvature of the lenses are as shown. find the ratio : \(\frac{R_1}{R_2}\) :
Two lenses one biconvex and other plano concave have same magnitude of power. The refractive indices of their materials are 1.5 and 1.7 respectively. If the radii of curvature of the lenses are as shown. find the ratio : \(\frac{R_1}{R_2}\) :
Show Hint
Biconvex lenses have twice the power of a plano-convex lens of the same material and radius. Use this to quickly set up ratios.
Updated On: Feb 4, 2026
- \(\frac{5}{2}\)
- \(\frac{5}{3}\)
- \(\frac{5}{4}\)
- \(\frac{5}{5}\)
Show Solution
The Correct Option is A
Solution and Explanation
Was this answer helpful?
1
Top Questions on Ray optics and optical instruments
- In an equilateral prism the path of a ray is shown in the figure. Determine the refractive index of the prism.
- JEE Main - 2026
- Physics
- Ray optics and optical instruments
- If the refractive index of a prism with small prism angle is 1.6 and angle of minimum deviation is 2.4. Then prism angle of prism is ______.
- GUJCET - 2026
- Physics
- Ray optics and optical instruments
- Find the value of angle of emergence for a emergent ray from the prism in the figure given below (assume a ray entering a $60^\circ$ equilateral prism at a specific angle). (refractive index $\mu = \sqrt{3}$ and air $\mu = 1$).
- GUJCET - 2026
- Physics
- Ray optics and optical instruments
- Two thin convex lenses of focal length $f_1$ and $f_2$ are placed in contact with each other. The equivalent power of the lens combination is ______.
- GUJCET - 2026
- Physics
- Ray optics and optical instruments
- Want to practice more? Try solving extra ecology questions todayView All Questions
