Newton’s corpuscular theory:
The corpuscular theory of light was proposed by Newton in 1675.
The main features of Newton’s corpuscular theory of light are as follows.
1. According to Newton, light consists of extremely small weightless and elastic particles. These particles are called as corpuscles.
2. These particles are emitted from a source of light in all directions.
3. These particles travel in a straight line with constant velocity in the same medium.
4. When these particles enter our eyes, we get a sensation of light.
5. The different colors of light are due to different sizes and masses of the particles.
6. These particles are repelled by the reflecting surfaces. On the basis of this, reflection of light can be explained.
7. These particles are attracted by the refracting surfaces. On the basis of this, refraction of light can be explained.
8. When these particles travel from one medium to other there will be change in direction and velocity of particles.
Drawback’s of Newton’s corpuscular theory:
1. As light consists of small particles, emission of particles from a source causes reduction in the mass of source of light. It has been experimentally proved that there is no reduction in the mass of the source of light.
2. If light is incident on a transparent material like glass or water, some part of light is reflected and some part of light is refracted. This simultaneous phenomenon of reflection and refraction cannot be explained on the basis of corpuscular theory.
3. According to Newton different colors of light are due to the different sizes and masses of the particles. But this fact was not experimentally proved.
4. The application of Newton’s theory to refraction concludes that velocity of light in air medium is less than velocity of light in denser medium but experimentally it was found to be wrong.
5. Several phenomena of light such as double refraction, interference, diffraction and polarization of light cannot be explained on the basis of corpuscular theory.
The theory states that the particles are considered to be weightless. Then how can emission of these particles from a body reduce its mass (as given in the drawbacks)?
ReplyDeletebecause they carry energy... Which comes from reduction in mass... I guess
DeleteNo sankalp you are totaly wrong albert Einstein gave formula E=mc*c which means thay change in mass *speed of light is thr energy varied got it
Deletedear
ReplyDeletethe particle is considered as weightless
i think ..any thing ..any particle it must have some quantity of matter ..only than its existance is possible
in simple word ..every particle must have some mass ..ie..weight..
that why they wrote this...
with the loss of mass as carpuscles emerged from the source ..it should reduce the mass of the source...which practically wrong..thanku
A/c to Newton times there is no discovery which clear i. e. Light is a photons particles and carry energy about photons so a/c he was discovered.
ReplyDeleteBut He is great scientist.
How to Play the Slots - CasinoRatos
ReplyDeleteFor 플레이 포커 instance, slots on a 1xbet korea casino will usually offer a 스마일토토 number of slot games, which means pci e 슬롯 that each spin of the slots will offer 리드 벳 multipliers in the same