Mark the correct options.

Which of the following quantities related to a lens depend on the wavelength or wavelengths of the incident light?

Which of the following quantities increase when wavelength is increased? Consider only the magnitudes.

A convex lens $(f=0.15 \mathrm{m})$ and a concave mirror (focal length $=0.3 \mathrm{m}$) are placed so that their optical axes $PQ$ and $RS$ are parallel to each other and separated by $0.6 \mathrm{cm}$ as shown. An lateral object $AB$ of height $1.2 \mathrm{cm}$ is placed on the optical axis $PQ$ at a distance of $0.2 \mathrm{m}$ from lens. If $A\text{'}B\text{'}$ is the image after refraction and reflection then choose the correct option(s).

. A point object is placed $30 \mathrm{cm}$ in front of an equiconvex lens of radius of curvature $15 \mathrm{cm}$ and made of glass of refractive index $\frac{3}{2}.$ On placing a convex mirror of radius of curvature $15 \mathrm{cm}$ behind the lens on image side as shown in figure, the final image is found to coincide with the object. The possible distance $\mathrm{x}$ between convex lens and convex mirror is

Consider three converging lenses $L_1, L_2$ and $L_3$ having identical geometrical construction. The index of refraction of $L_1$ and $L_2$ are ${\mu }_1$ and ${\mu }_2$, respectively. The upper half of the lens $L_3$ has a refractive index ${\mu }_1$ and the lower half has ${\mu }_2$. A point object $O$ imaged at $O_1$ by the lens $L_1$ and at $O_2$ by the lens $L_2$ placed in same position. If, $L_3$ is placed at the same place,