AI Gen: Ray Optics question bank (Physics)

A thin equiconvex lens of refractive index $\mu_1 = 1.5$ and radius of curvature $R$ is placed on a horizontal plane mirror. When a space between the lens and the mirror is filled with a liquid of refractive index $\mu_2$, the focal length of the combination is found to be $2R$. The value of $\mu_2$ is:

Topic: Ray Optics | Source: AI Generated (JEE Main)

A concave mirror of focal length $15\text{ cm}$ is placed on a horizontal table. Water (refractive index $\frac{4}{3}$) is filled in it up to a depth of $20\text{ cm}$. An object is placed at a height of $25\text{ cm}$ above the water surface. The final image formed by the system is at a distance (in cm) from the water surface:

Topic: Ray Optics | Source: AI Generated (JEE Main)