Advertisements
Advertisements
प्रश्न
The adjacent diagram shows two right-angled isosceles prisms A and B. Complete the diagram to show the path of rays P and Q emerging out of the prism B. What principles have you used to complete the diagram?
Advertisements
उत्तर
The completed ray diagram is shown in the figure.
Following two principles are used to complete the diagram:
(1) A ray of light incident normally on the interface of two media passes undeviated.
(2) A ray of light striking the interface of two media (glass and air) from glass, at an angle of incidence, equal to 45° (which is greater than the critical angle = 42°) suffers total internal reflection.
APPEARS IN
संबंधित प्रश्न
Calculate the speed of light in a medium whose critical angle is 30° ?
How does a ray of light bend when it travels from denser to rarer medium.
How does a ray of light bend when it travels from when it is normal to the interface of the two media.
Write down the relationship between the critical angle and the refractive index of the medium.
Draw a diagram, properly labelled, to illustrate the use of a total reflecting prism (a right-angled isosceles prism) to turn a ray of light through 180°. Name an instrument in which this device is used.
A ray of light is incident on a glass surface at an angle of 50° with the corresponding angle of refraction 30°. Find the value of the R.I. of glass.
Solve Numerical example.
From the given data set, determine angular dispersion by the prism and dispersive power of its material for extreme colours. nR = 1.62 nV = 1.66, δR = 3.1°
What is the phenomenon used in optical fiber? Explain.
A green light is incident from the water to the air-water interface at the critical angle (θ). Select the correct statement.
A jar of height h is filled with a transparent liquid of refractive index µ (Figure). At the centre of the jar on the bottom surface is a dot. Find the minimum diameter of a disc, such that when placed on the top surface symmetrically about the centre, the dot is invisible.
