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
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
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
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
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
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Wave Optics » Exercise - 18. 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- Wave Optics » Exercise - 1& 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
- Wave Optics » Exercise - 15. When a ray of light travels from one medium to another medium and bent towards the normal then this phenomenon is known as : (a) Reflection (b) Refraction (c) Diffraction (d) Total internal reflection
- Physics » Notes » Reflection Reflection : When a ray of light falls on a surface and returned into the same media, then this phenomenon, is called reflection of light. Laws of Reflection : The reflection at a plane surface always takes place in accordance with the following two laws : (i) The incident ray, the reflected ray and normal to surface at the point of incidence all lie in the same plane. (ii) The angle of incidence, i is equal to the angle of reflection r, i. e., ∠i = ∠r. Figure-1 : Reflection Where, i = Angle of incidence r = Angle of reflection #Note : 1. After reflection velocity, wavelength and frequency of light remains same but intensity decreases. 2. If light ray incident normally on a surface, after reflection it retraces the path. Total Internal Reflection : When Angle of incidence exceeds the critical angle than light ray comes back in to the same medium after reflection from interface. This phenomenon is called Total internal reflection. When a ray of light goes from denser to rarer medium it bends away from the normal and as the angle of incidence in denser medium increases, the angle of refraction in rarer medium also increases and at a…
- Wave Optics » Exercise - 19. 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