Optics PYQ — Page 21

A light ray is incident perpendicular to one face of a $90^{\circ}$ prism and is totally internally reflected at the glass-air interface. If the angle of reflection is $45^{\circ}$, we conclude that the refractive index $n$ 

The maximum number of possible interference maxima for slit-separation equal to twice the wavelength in Young's double-slit experiment is

The angle of incidence at which reflected light totally polarized for reflection from air to glass (refractive index $n$ ), is

To get three images of a single object, one should have two plane mirrors at an angle of

The image formed by an objective of a compound microscope is

To demonstrate the phenomenon of interference, we require two sources which emit radiation

Which of the following is used in optical fibres ?

Wavelength of light used in an optical instrument are $\lambda_1=4000 Å$ and $\lambda_2=5000 Å$, then ratio of their respective resolving powers (corresponding to $\lambda_1$ and $\lambda_2$ ) is

If two mirrors are kept at $60^{\circ}$ to each other, then the number of images formed by them is