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semiconductor laser physics
semiconductor laser physics advantage of semiconductor devices i.semiconductor devidlces are low devices ii.semiconductor devices are cheaper than vaccum tube devices iii.semiconductor devices are much smaller in size and weight iv.semiconductor devices have much longer life than life of vaccumtube V.semiconductor devices start operating instantly. Disadvantage of semiconductor device i.it is very sensative to change in temperature. ii.it cannot handle much power as vaccum tubes. iii.it is difficult to produce the semiconduct…
how many basic waveforms are there
how many basic waveforms are there There are types three types of wave front 1.spherical wavefront: When the sources of light is a point source then wavefront produced by them is called spherical wavefront. 2.cylindirical wavefront: When the source of light is linear in shape then wavefront produced by them is called cylindirical wavefront. 3.plane wavefront: When the source of light is at very large distance then small part of their wavefront is called plane wavefront. Cohrent sources The source of light which emit light wave o…
how many types of rainbow
how many types of rainbow 1Rainbow 2.secondary Rainbow 1.Primary rainbow Primary rainbow is formed by one total internal reflection and two refraction of ray of light from water droplets i. It is brighter than secondary rainbow ii. It subtends an angle of 42°at the eye. iii. It shows all the colour of the solar spectrum with red colour outside and violent colour inside. Diagram: Primary ranbow Secondary rainbow Secondary rainbow is formed by two total internal reflection and two refraction of ray of light from water droplet…
interference of light experiment
interference of light experiment A.Differaction of light The phenomenon of bending of light around the corner of an obstacle ór aperature in the path of light on account of this bending light penetrates into geometrical shadow of the obstackle is called differaction of light. B. Interference of light The phenomenon of redistribution of light energy on account of superpostion of light waves from two coherent sources is called interference of light. The point where resultant Intensity is maximum is called constructive interfere…
applications of ferromagnetic materials
applications of ferromagnetic materials Ferromagnetic subtance 1.The substance when placed in magmetic field acquire strong magnetism in the direction of applied magnetic field is called ferromagnetic subtance. 2.when a ferromagnetic substances is brought near the end of powerful magnet then it get strongly attract. 3.When a rod of ferromagnetic subtance is suspended freely between two poles of the magnet its axis becomes parallel to the magnetic field. 4.When a ferromagnetic solution is kept in U shape tube and one arm of the tube i…
paramagnetic molecules
Parmagnetism molecule 1.The substance when placed in a magmetic field acquire feeble magnetism in the direction of applied magnetic field is called paramagnetic substance. 2.when a paramagnetic subtance is brought near the end of powerful magnet then it get some what repelled. 3.when a rod of paramagnetic substances is suspended freely between two poles of the magnet then it axis becomes parallel to the magnetic field 4.When a paramagnetic solution is kept in U shape tube and one arm of the tune is kept between two poles of the magnet…
why diamagnetic substances are repelled by magnetic field
why diamagnetic substances are repelled by magnetic field Diamagnetic substance 1.The substance when placed in a magnetic field acquire feeble magnetism opposite to the direction of applied magnetic field is called diamagnetic substance. 2.When a diamagnetic substances is brought near the end of powerful magnet then it get some what replied. 3.When a rod of diamagnetic substance is suspended freely between two ploes of the magnet then its axis becomes parellal to the magnetic field . 4.When a diamagnetic solution is kept in U shape…
properties of magnetic field lines brainly
properties of magnetic field lines brainly 1.Magnetic field lines is a closed curve. 2.The direction of magnetic field lines is a from north pole to South pole outside the magnet and from South pole to north pole in side the magnet. 3.A tangent drawn at the point on magnetic field lines gives the direction of magnetic field. 4.Two magnetic field lines never intersect each other 5.Crowding of magnet fieldlines increases then strength of the magnetic field increases and viceversa. Note:- Any Questions doubt please I'm f…
Types of ac generator
Types of ac generator AC Generator It is an electrical device which produces alternating current energy from mechanical energy. Principle It is based on the phenomenon of electromagnetic induction. Construction It consist of following essential parts Armature It consist of large no of turns of insulated copper wire wound over a laminated soft iron core. Field magnet It is a strong electromagnetic in which armature coil is rotated Slip rings It is a two hollow metallic ring from which two ends of armature coil are connected.…
van de graaff generator class 12
van de graaff generator class 12 Van de graf generator It is a device used to build up very high voltage Principle If a hollow conductor is in contact with another conductor,the charge given to conductor is immediately transferred to the hollow conductor to accept large charge due to this potential build up. Construction and working It consist of hollow metallic sphere mounted on insulted stand .A belt is run on two pulley .A metal comb C1spray charge and hands .it over to sphere this process continues till up the charge very h…
properties of electric field lines
properties of electric field lines 1.positive charge is the source of electric field lines and negative charge is the sink of electric field lines. 2.no of field lines starting from +ve charge and terminating at _ve charge is proportional to the amount of charge. 3.electric field lines is an open curve bit magnetic field lines is a close curve. 4.no of field lines /area is proportional to the strength of the electric field. 5.two electric field lines never intersect each other. 6.A tangent drawn at the point on electric field lines giv…
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