Light from outside has to fan through your eyeball to fall upon the retina. Mention the media in between that acts as refractive meida to the light.

A beam of monochromatic light of wavelength 500 nm falls on two parallel slits. The distance between the slits is 0.15 mm. Determine the width of the interference fringes in mm unit on a screen placed at a distance of 1.5 m from the plane of the slits.

A beam of light is sent along the line x-y=1 , which after refracting from the x-axis enters the opposite side by turning through 30^0 towards the normal at the point of incidence on the x-axis. Then the equation of the refracted ray is (a) (2-sqrt(3))x-y=2+sqrt(3) (b) (2+sqrt(3))x-y=2+sqrt(3) (c) (2-sqrt(3))x+y=(2+sqrt(3)) (d) y=(2-sqrt(3))(x-1)

A triangle ABC has vertices A(5, 1), B (-1, -7) and C(1, 4) respectively. L be the line mirror passing through C and parallel to AB and a light ray eliminating from point A goes along the direction of internal bisector of the angle A, which meets the mirror and BC at E, D respectively. If sum of the areas of triangle ACE and triangle ABE is K sq units then (2K)/5-6 is

A ray of light is incident at an angle of 60^(@) on a face of a prism with refracting angle 30^(@) . If the ray emerges from the other face and makes an angle of 30^(@) with the incident ray then, show that the emergent ray passes perpendicularly through the refracting surface. Determine the refractive index of the material of the prism.

The light from a clear blue portion of the sky shows a rise and fall of intensity when viewed through a polaroid which is rotated. Describe, with the help of a suitable diagram, the basic phenomenom/process which occurs to explain this observation.

A beam light is sent along the line x-y=1, which after refraction from the x-axis enters the opposite side by turning through 30^@ towards the normal at the point of incidence on the x-axis. Then the equation of the refracted ray is

A ray of light travelling in a transparent medium falls on a surface separating the medium from air at an angle of incidence of 45^(@) . The ray undergoes total internal reflection. If mu is the refractive index of the medium with respect to air, select the possible values (s) of mu from the following

A light of wavelength 6000Å from a distant source falls on a narrow slit of width 0.5 mm. As a result, a diffraction fringe pattern is formed on a screen placed at a distance 2.0 m from the slit. What is the distance between first two minima points formed on the either side of central maximum of this fringe pattern.