LIGHT/OPTICS

Four rays of light parallel to optic axis, .and their path after passing through an optical system are shown in the following two columns. Match List - I with List - II and select the correct answer using the codes given below the lists:

Plane Polarized Light And Optical Activity|Optical Activity|Molecular Asymmetry And Chirality Of Objects|Chiral Carbon Or Asymmetric Centre|Summary

Properties Of Light|Ray Optics|Ray And Beam|Types Of Beam|Refraction Of Light|Refractive Index|Laws Of Refraction

Four rays of light above the optic axis (parallel to it) and their path after striking an optical system are shown in column-I . Match the corresponding optical instrument from column-II:

Match the columns : {:(,"Column I",,"Column II"),(1.,"Fovea",a.,"Provides opening for entry of light"),(2.,"Iris",b.,"Transduces RBG light"),(3.,"Pupil",c.,"Transmits information to CNS"),(4.,"Lens",d.,"Controls amount of light entering"),(5.,"Optic Nerve",e.,"Focus light on retina"):}

Optical Fibre: Optical fibre works on the principle of total internal reflection. Light rays can be used to transmit a huge amount of data, but there is a problem here - the light rays travel in straight lines. So unless we have a long straight wire without any bends at all, harnessing this advantage will be very tedious. Instead, the optical cables are designed such that they bend all the light rays' inwards (using TIR). Light rays travel continuously, bouncing off the optical fibre walls and transmitting end to end data. It is usually made of plastic or glass. Modes of transmission: Single-mode fibre is used for long-distance transmission, while multi mode fiber is used for shorter distances. The outer cladding of these fibres needs better protection than metal wires. Although light signals do degrade over progressing distances due to absorption and scattering. Then, optical Regenerator system is necessary to boost the signal. Types of Optical Fibres: The types of optical fibers depend on the refractive index, materials used, and mode of propagation of light. The classification based on the refractive index is as follows: • Step Index Fibres: It consists of a core surrounded by the cladding, which has a single uniform index of refraction. • Graded Index Fibres: The refractive index of the optical fibre decreases as the radial distance from the fibre axis increases. Light signal through optical fibre may degrade due to:

The optical path difference between two light waves arriving at a point simultaneously is 260 (lamda)/4 . The point is

Optical Fibre: Optical fibre works on the principle of total internal reflection. Light rays can be used to transmit a huge amount of data, but there is a problem here - the light rays travel in straight lines. So unless we have a long straight wire without any bends at all, harnessing this advantage will be very tedious. Instead, the optical cables are designed such that they bend all the light rays' inwards (using TIR). Light rays travel continuously, bouncing off the optical fibre walls and transmitting end to end data. It is usually made of plastic or glass. Modes of transmission: Single-mode fibre is used for long-distance transmission, while multi mode fiber is used for shorter distances. The outer cladding of these fibres needs better protection than metal wires. Although light signals do degrade over progressing distances due to absorption and scattering. Then, optical Regenerator system is necessary to boost the signal. Types of Optical Fibres: The types of optical fibers depend on the refractive index, materials used, and mode of propagation of light. The classification based on the refractive index is as follows: • Step Index Fibres: It consists of a core surrounded by the cladding, which has a single uniform index of refraction. • Graded Index Fibres: The refractive index of the optical fibre decreases as the radial distance from the fibre axis increases. Optical fibre works on the principle of:

Optical Fibre: Optical fibre works on the principle of total internal reflection. Light rays can be used to transmit a huge amount of data, but there is a problem here - the light rays travel in straight lines. So unless we have a long straight wire without any bends at all, harnessing this advantage will be very tedious. Instead, the optical cables are designed such that they bend all the light rays' inwards (using TIR). Light rays travel continuously, bouncing off the optical fibre walls and transmitting end to end data. It is usually made of plastic or glass. Modes of transmission: Single-mode fibre is used for long-distance transmission, while multi mode fiber is used for shorter distances. The outer cladding of these fibres needs better protection than metal wires. Although light signals do degrade over progressing distances due to absorption and scattering. Then, optical Regenerator system is necessary to boost the signal. Types of Optical Fibres: The types of optical fibers depend on the refractive index, materials used, and mode of propagation of light. The classification based on the refractive index is as follows: • Step Index Fibres: It consists of a core surrounded by the cladding, which has a single uniform index of refraction. • Graded Index Fibres: The refractive index of the optical fibre decreases as the radial distance from the fibre axis increases. In graded index optical fibre: