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Refraction concave and convex glasses are used to correct the refractive errors of human eyes; Peepholes in the doors, magnifying glasses, binoculars, cameras, lenses in the projectors, etc. use the principle of refraction of light. FAQs on Refraction. Q.1: Define refraction of light?
Laws of refraction: (i) The incident ray, the refracted ray and the normal to the interface of two transparent media at the point of incidence, all lie in the same plane. (ii) The ratio of sine of angle of incidence to the sine of angle of refraction is a constant, for the light of a given colour and for the given pair of media.
Description. Reflection is the bouncing back of light when it strikes a smooth surface. Refraction is the bending of light rays when it travels from one medium to another. Nature Of Surface. Generally occurs on shinny surfaces that only allow rebounding of light without permitting penetration through it.
Explain the refraction of light through a triangular glass prism using a labelled ray diagram. Hence, define the angle of deviation. [3 Marks] [Dispersion of Light]
Q 4. Question 5. Which of the following phenomena of light are involved in the formation of a rainbow? (a) Reflection, refraction and dispersion. (b) Refraction, dispersion and total internal reflection. (c) Refraction, dispersion and internal reflection. (d) Dispersion, scattering and total internal reflection. View Solution.
Polarisation. Refraction and Reflection of Plane Waves using Huygens Principle. Fresnel Diffraction. Fraunhofer Diffraction. Here the wavefront used is spherical. Here the wavefront used is plane. An image is formed at a finite distance. An image is formed at an infinite distance. A lens is not required.
Explain the refraction of light through a glass-slab with neat ray diagram. On entering into the glass medium light ray bends towards the normal that is light ray gets refracted on entering the glass medium. After getting refracted this ray now travels through the glass slab and comes out of the glass slab by refraction from the other interface ...
For a ray which goes from the air to a medium. Nasin i = nmsin r. Here nm refers to the refractive index of the medium. Na refers to the refractive index of air. i refers to the angle of incidence. r refers to the angle of refraction. Now one must nm the subject of the above equation. Nm = nasini sinr. Also, na = 1.
(e) Ray optics is based on the assumption that light travels in astraight line. Diffraction effects (observed when light propagatesthrough small apertures/slits or around small obstacles)disprove this assumption. Yet the ray optics assumption is socommonly used in understanding location and several otherproperties of images in optical instruments.
The change in direction or bending of a light wave passing from one transparent medium to another caused by the change in wave’s speed is the refraction. The extent of bending of light rays entering from one medium to another is the refractive index and is denoted by the ‘n’. It is represented as n = c/v, where c = velocity/speed of light ...
