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IDENTIFICATION OF LENS, PLUS AND MINUS, SPHERICAL & CYLINDRICAL LENS || लेंस की पहचान कैसे करें ||

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Identification of a lens - Convex lens - 1.  It is thick in the center and thin at margins.  2.  Convex lens is a magnifying lens, objects appear bigger in size.  3.  If we move a lens the image moves in opposite direction.  4.  It is denoted by PLUS(+)  sign 5.  It is used to correct hypermetropia and presbyopia.  Concave lens - 1.  It is thin in the center and thick at margins.  2.  It is a minifying lens, objects appear smaller in size.  3.  If we move a lens the image moves in same direction.  4.  It is denoted by MINUS(-)  sign.  5.  It is used to correct myopia.   ------------------------------------------------------------------------------- Both convex and concave lenses are of two types : 1. Spherical lens - i. Movement of images can be seen in all direction.  ii. If we rotate a lens, there is no distortion of image...
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REFLECTION, REFRACTION & PRISM

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Reflection of light - When a ray of light strikes a polished surface, it bounces back in a particular direction. This is known as reflection of light.  Laws of Reflection - The laws of reflection can be summarized as : 1. The incident ray,  the reflected ray and the normal at the point of incidence, all lies in the same plane.  2. The angle of incidence is equal to the angle of reflection.   Refraction of light  - When a ray of light passes from one medium (say air)  to another medium (say glass)  of different optical density, it deviates from its original path. This is called refraction.  Laws of Refraction - 1. The incident ray and the refracted ray are on the opposite sides of the normal at the point of incidence and all three lie in the same plane.  2. The ratio of sine of angle of incidence to the Sine of angle of refraction is constant.  This is known as snell's law.  Sine ang...
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NATURAL SEABUCKTHORN FACE WASH

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Net Content : 100 ML PRODUCT CODE : 21000102 MRP : ₹ 406 Incl. of GST Description- Seabuckthorn Natural Face Wash helps in cleansing the skin by getting rid of pollutants settled on the pores. Made with extracts of the Seabuckthorn Fruit Pulp, Soapnut, Shikakai and Aloe Vera and Essential Oil of Seabuckthorn, use the face wash regularly to get a clear and supple  skin. This Seabuckthorn Natural Face Wash contains: SEABUCKTHORN FRUIT PULP EXTRACT: - Using the sea buckthorn extracts daily helps slow down the signs of aging by enriching the tissues in the skin with the right kind of nutrients. SOAPNUT EXTRACT: - With great cleansing and cooling properties, soapnut extract can make the skin feel very gentle and soft. It has also shown minor healing in skin problems like eczema, psoriasis, pimples, and blackheads. SHIKAKAI EXTRACT: - It acts as a natural scrub which deep cleanses the skin and helps it get rid of settled dust and di...
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