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# Wave Optics – 1 – 2

6. According to Shell’s Law :

(a) Sin i / Sin r = 0
(b) Sin i / Sin r =
(c) Sin i / Sin r = μ
(d) None of these

Explanation
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7. When a light travels from rarer medium to denser medium then.

(a) It bends away from normal
(b) It bends towards the normal
(c) goes in straight line
(d) None of these

Explanation
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8. Total internal reflection takes place when light is incident :

(a) On concave mirror
(b) from air on a plane glass surface at a certain given angles
(c) from air on a plane glass surface at any angle
(d) from inside glass surface in water at a certain given angle

Explanation
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9. For total internal reflection, the angle of incidence always :

(a) Less than critical angle
(b) Greater than critical angle
(c) Equal to critical angle
(d) None of these

Explanation
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10. An air bubble in water in a glass shines well because of :

(a) dispersion of light
(b) reflection of light
(c) refraction of light
(d) total internal reflection