11Th Physics Yugbodh4/20/2021
Even better is to search for jobs by type like Full Time, Part Time, Summer Trainees - Interns, Work From Home or Freelancing.Reach out to millions of job offers by posting your resume and creating alerts for free.Intensity of scattered light is The following properties or phenomena can be explained by scattering. 1. Sky is blue. 2. Sun is reddish at the time of sunrise and sunset 3.
School English General Syllabus Subject Code List of Class 9th to 12th Revised Syllabus for 10th Classes Revised Syllabus for 11th Classes Revised Syllabus for 12th Classes Revised Syllabus for 11th Classes Ray Optics And Optical Instruments Class 12 Notes Pdf Download Accounts- pariksha adhyan English hindi- pariksha adhyan Business studies- pariksha bodh (yugbodh) Business Economics- pariksha bodh (yugbodh) Thanks for watching guys Subscribe our channel if. Ray Optics And Optical Instruments Class 12 Notes Pdf Download Laws of reflection:- 1. The incident ray, normal and reflected ray all lie in the same plane. The angle of incidence is always equal to angle of reflection. All the distance measurements are done from pole of the mirror and height measurements are from the principal axis. The distances measured in the direction of incident ray are positive and in opposite direction of incident ray are negative. The heights measured upwards from principal axis are positive and downwards negative. ![]() Linear magnification is ratio of the size of the image to the size of the object.Magnification If m 1 then the image is magnified. If m The phenomenon of bending of light at the interface of two media when it enters from one medium to another is called refraction of light. The incident ray, normal and refracted ray all lie in the same plane. The ratio of sine of angle of incidence and sine of angle of refraction is constant for a given pair of media. Snells law of refraction:- The ratio of sine of angle of incidence and sine of angle of refraction is the refractive index of refracting medium with respect to the incident medium. ![]() If the absolute refractive index medium 1 is greater than that of medium 2 then medium 1 is said to be optically denser medium and medium 2 is said to be optically rarer medium. The ratio of absolute refractive index of one medium to that of another is called relative refractive index of both the media. Principle of reversibility:- The relative refractive index of medium 2 w.r.t. An object under water ( any medium ) appears to be raised due to refraction when observed inclined and Shift in the position (apparent) of object is X t 1 1n) where t is the actual depth of the medium. The Phenomenon of reflection of light completely in to the denser medium without refraction in to rarer medium is called Total Internal Reflection. The light must propagate from optically denser medium to optically rarer medium. The angle of incidence in the denser medium must be greater than critical angle of incidence for the given pair of media. ![]() D R n n SinC Applications:- Brilliance of diamond, totally reflecting prisms, Mirage, Looming, Optical Fibre. Refraction through spherical surfaces:- When light falls on a convex refracting surface, it bends and the relation between U, V and R is given by Lens makers formula or thin lens formula is given by For Convex Lens R 1 ve;R 2 ve Concave lens R1-ve; R2 ve. When two lenses are kept in contact the equivalent focal length is given by Combination of lenses help to 1)Increase the magnification of the image 2) Increase the sharpness of the final image by reducing the defects of images formed by a singe lens. Make the image erect w.r.t the object 4) Increase the field of view The lens formula is given by When light passes through a glass prism it undergoes refraction. The expression for refractive index is As the angle of incidence increases, the angle of deviation decreases, reaches a minimum value and then increases. This minimum value is called angle of minimum deviation D m. The phenomenon of splitting up of polychromatic light in to its constituent colours is called Dispersion of light. Cause of dispersion: According to Cauchys formula, the refractive index (n) of a material depends upon wavelength () and is given by: a b 2 c 4, where a, b, c are constants. Scattering of light takes place when size of the particle is very small when compared to the wavelength of light. Intensity of scattered light is The following properties or phenomena can be explained by scattering. Sky is blue. 2. Sun is reddish at the time of sunrise and sunset 3.
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