CBSE Class 12 · 2017 · Geometrical OpticsVery Short Answer

The focal lengths of the objective and the eyepiece of a compound microscope are $1\mathrm{cm}$ and $2\mathrm{cm}$ respectively. If the tube length of the microscope is $10\mathrm{cm}$, the magnification obtained by the microscope for most suitable viewing by a relaxed eye …

The radius of curvature of a convex mirror is $30\mathrm{cm}$. It forms an image of an object which is half the size of the object. Find the separation between the object and the image.

\textbf{Case study (prism and total internal reflection):} A ray of light suffers successive refractions on passing through the two faces of a prism; $\mu =\frac{\sin \left(\frac{A+{\delta }_m}{2}\right)}{\sin \frac{A}{2}}$. If the angle of incidence on the second surface exceeds th …

When a ray of light of wavelength $\lambda$ and frequency $\nu$ is refracted into a denser medium:

The critical angle for a ray of light passing from glass to water is minimum for:

Three beams of red, yellow and violet colours are passed through a prism, one by one, under the same condition. When the prism is in the position of minimum deviation, the angles of refraction from the second surface are $r_R,r_Y$ and $r_V$ respectively. Then: