Gujarat Board-2018

Detailed information can be obtained by the OIL Immersion objective of a microscope because the objective has _______.

The ratio of resolving power of telescope, when lights of wavelengths $5000 \stackrel{\circ }{\mathrm{A}}$ and $4000 \stackrel{\circ }{\mathrm{A}}$ are used, is _____

For plane mirror, the value of magnification $m=1$, then its focal length $f=$_____.

An object is placed at a distance of $25 \mathrm{cm}$ on the axis of a concave mirror having focal length $20 \mathrm{cm}$. What will be the lateral magnification of an image?

Depth of a completely filled well is $11 \mathrm{m}$ and refractive index of water is $1.33$. If viewed normally from the top, by how much height would the bottom of the well appears to be shifted up?

Which of the following is responsible for the glittering of a diamond?

A defect of vision  in which lines in one plane of an object appears in focus while those in another plane are out of focus is called ______.

Derive an equation $\delta =\mathrm{i}+\mathrm{e}-\mathrm{A}$ for an equilateral prism and using it, obtain an equation for the refractive index $\left(n\right)$ of the material of the prism.