Optics 6th Year test

The bending of light as it goes from one medium to another of different refractive index.

(i) The incident ray, the normal at the point of incidence and the reflected ray all lie on the same plane.(ii) The angle of incidence is equal to the angle of reflection (i = r).

Laws of

When the angle of incidence in the denser of the two media is greater than the critical angle and light is reflected back into the denser medium.

.........................is the angle of incidence where the angle of refraction is 90°. The light must travel from an optically more dense medium to an optically less dense medium.

is a formula/law used to describe the relationship between the angles of incidence and refraction, when referring to light or other waves passing through a boundary between two different media, such as water, glass, or air.

A .......... image can be obtained on a screen, the light rays meet.

The critical angle for the glass is 38⁰. Calculate the refractive index of the glass. (answer to 2 decimal places)

What is the focal length of a lens which has a power of -2 m⁻¹?

A .............. mirror offers a wide field of view.

If a medium has a refractive index of 2.42, what is the speed of light in that medium?