Skip to main content

GOD'S PARTICLE 2.0

 
ELECTRONS AT WORK


 Electron was discovered by J.J. Thomson  more than 100 years ago.  It is said to carry negative charge and negligible mass.  It is present in all the elements

      When electron flows in a conductor, it is electric current.  We know, nothing serves like electricity.

      Around the moving electrons magnetic field is formed and it gives rise to electromagnet.

   When the electron oscillates electromagnetic waves like radio waves are radiated.  It is used for communication purpose.  

  While the electrons are moving in a conductor, they collide with the atoms and produce heat.  Many heating devices are made using this principle.

  In atoms, when electron jumps from higher orbit to lower orbit, it loses energy in the form of light waves, X-rays etc,.

   When the electrons moves in the magnetic field  at an angle, it experiences a force called Lorentz force.  This force is responsible for the working of motors.

      The electrons in the outer most orbit(valence electrons) of an element's atom forms bond with other atoms and make variety of molecules(NaCl, HCl).

  In the old TV monitor(cathode ray tube), the electron beam strike , scan the screen and creates picture.  That is, when electron hit the florescent screen, light is emitted.

      When light hit certain material, electrons are ejected.  (photoelectric effect).  When the light image falls on the retina of the eye, electrons are emitted and electrical signal is sent to the brain.  A digital camera also works on this principle.

      The electronic element like transistor, diode, FET manipulate the flow of electrons and help us to create useful circuits and devices.  

      When the electron move very fast, it behave likes waves.  This electron wave is smaller than light waves.  Hence we build electron microscope to observe very tiny objects like virus, molecules etc,.

 The invisible electron is invincible.
  
Science update:  French mathematician Yves meyer has been awarded in the 2017 abel price Rs. 4.6 crorer for his work on wavelets with applications in data compression and medical imaging.        
Labels:

Comments

Post a Comment

Popular posts from this blog

LISSAJOUS FIGURES

  Definition:  "When a particle is subjected to two sine wave motion or two oscillatory motion at right angles, the particle describes lissajous figures".      We know sine wave motion and circular motion is basically same.  Hence we draw two circles A and B perpendicular to each other.  The circle B rotates twice faster than circle A.  That is, frequency of circle B is two times than that of A.        A particle at the intersection of two circles is subjected to two sine wave motion   A and B at 90 degree simultaneously.  The particle will describe figures depending on the frequency and phase of A and B .  In our case, the ratio of frequency is  1:2 and the two waves are in phase.        To draw lissajous figures :  A moving point in both the circles are chosen.   Here we should remember; during the time taken by the circle A to complete one rotation, circle B completes two.  Hence the points are marked on the circles according to their speed.  Then straight lines
Post a Comment
Read more

THE PARABOLA

          A jet of water shooting from a hose pipe will follow a parabolic path.  What is the so special about parabola.    Y= x^2 Draw a graph for the above equation.  It will result in a parabola.  This parabola is also called unit parabola.  Any equation involving square will yield a parabola. Example:  Y = 2x^2 +3x+3 (also called quadratic equation)    X= 2 and -2, both  satisfies the equation 4 = X^2.  Parabolic equations always have two solutions.     Any motion taking place freely under gravity follows parabolic path. Examples:   An object dropped from a moving train,   A bomb dropped from flying plane,  A ball kicked upwards.      If a beam of light rays fall on the parabolic shaped mirror, they will be reflected and brought to focus on a point.  This fact is made use of in Dish Antenna, Telescope mirrors, etc.      Inverted parabola shape is used in the construction of buildings and bridges.  Because the shape is able to bear more weight.      A plane
Post a Comment
Read more

CASINO'S GAME

           Let us find out how the casino survives with mathematics.      Say, your friend invite you for a game of dice.  You must bet (wager) 2 dollars.  If you roll 'six' you will get back 8 dollars.  The game will go on for 30 rounds.  All sounds good.      The probability of rolling 'six' is 1/6.  Since the game will be played for 30 times, the 'expected win' is 30*1/6 = 5.  That is, you are expected to win 5 rounds out of 30.  Hence your gain will be 5 * 8 =40 dollars.  ok.  This also implies that you will loose 25 rounds.  Hence your loss will be 25*2 =50 dollars.  Your net gain will be gain-less = 40-50 = -10 dollars. For 30 rounds, the loss is -10 dollars, Hence, for one round =-10/30 = -1/3 dollars.  There will be a loss of -1/3 or 0.33 dollars per round.  It is not a fair game.     Let us make a simple formula to calculate  'Pay out per round\. The probability for a win = p The pay-out in case of win = V No. of rounds = n The expect
4 comments
Read more