uses of optical fibres

Optical Communication - Optical Fibres - An optical fiber is a dielectric wave guide that transports light signals from one place to another just as a twisted-wire pair or a coaxial cable transports electrical signals. It consists of a central core within whi..

An optical fiber is a dielectric wave guide that transports light signals from one place to another just as a twisted-wire pair or a coaxial cable transports electrical signal..

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Polyester is used in making: Textiles, sarees, dress materials, and curtains Blended textiles with natural fibres. For example, when terylene is mixed with cotton, it is called terrycot and with wool, it is called terrywool. These blended fibres are again us..

Optical Centre - It is the centre of a lens. It is denoted by the letter O. A ray of light passing through the optical centre of a lens does not suffer any deviation. It is also referred to as optic cent..

The focal length of a convex lens is always positive and that of a concave lens in always negativ..

Introduction - The previous chapter dealt with the refraction of light by lenses and also about the formation of various types of images by a lens for different positions of the object. In this chapter let us find out how lenses are used in optical instruments like microscopes a..

. Some light can be seen. The analyzer should be rotated so that once again no light reaches the eye. Note that some light could be seen when the cane-sugar solution tube was placed between the two prisms whose axes were perpendicular to each other and no light was visible originally. So what made ..

Introduction - The previous chapter dealt with the refraction of light by lenses and also about the formation of various types of images by a lens for different positions of the object. In this chapter let us find out how lenses are used in optical instruments like microscopes a..

31. - A glass plate ( m = 1.5) is used as a polarizer. Obtain the polarizing angle of incidence. What is the angle of refraction when the reflected light is plane polarize..