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Lens Formula

The diagram s...

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The diagram shows a point source P inside a water container. Rays A and B starting from P are incident at the water-air interface. What are the angles of refraction for ray A and B, respectively. (Given $n_{w}$ = √2)

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Fig. 4.62 shows a point source P inside a water container. Three rays A, B and C starting from the source P are shown up to the water surface.
(a) Show in the diagram the path of these rays after striking the water surface. The critical angle for water-air surface is $48^{\circ}$ .
(b) Name the phenomenon which the rays A, B and C exhibit.

Q. Figures (a) and (b) show the refraction of a ray in air incident at

60^{o}

with the normal to a glass-air and water-air interface, respectively. Predict the angle of refraction in a glass when the angle of incidence in water is

45^{o}

with the normal to a water-glass interface [Fig.(c)].

Q. The diagram shows a point source P inside a water container. Four rays A, B, C and D starting from P are shown up to the water surface. Which of the following ray(s) will come out of the water-air interface. (Given

n_{w} = \sqrt 2

Q. The diagram shows a point source P inside a water container. Four rays A, B, C, D starting from the source P are shown upto the water surface.
(ii) Show in the diagram the path of these rays after striking the water surface. The Critical Angle for water air surface is

48^{o}

.
(ii) Name the phenomenon which the rays B and D exhibit.

Q. Figures (a) and (b) show refraction of a ray in air incident at

60^{\circ}

with the normal to a glass-air and water-air interface, respectively. Predict the angle of refraction in glass when the angle of incidence in water is

45^{\circ}

with the normal to a water-glass interface [Figure (c)].

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