List any four properties of light.
Answers
Answer:
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Explanation:
Some properties of light are particle-like, others are wave-like. The most important question in physics is: Insofar as the speed of light is concerned, does light behave like particles (then its speed will vary like the speed of ordinary projectiles), or it behaves like waves? We live in a schizophrenic world where, although the latter alternative is the false one, people fiercely worship it. In a world different from Einstein’s schizophrenic world the former alternative will OBVIOUSLY be the correct one:
Relativity and Its Roots Banesh Hoffmann, p.92: "Moreover, if light consists of particles, as Einstein had suggested in his paper submitted just thirteen weeks before this one, the second principle seems absurd: A stone thrown from a speeding train can do far more damage than one thrown from a train at rest; the speed of the particle is not independent of the motion of the object emitting it. And if we take light to consist of particles and assume that these particles obey Newton's laws, they will conform to Newtonian relativity and thus automatically account for the null result of the Michelson-Morley experiment without recourse to contracting lengths, local time, or Lorentz transformations. Yet, as we have seen, Einstein resisted the temptation to account for the null result in terms of particles of light and simple, familiar Newtonian ideas, and introduced as his second postulate something that was more or less obvious when thought of in terms of waves in an ether."
Gravitational redshift and White Dwarf stars Albert Einstein Institute: "One of the three classical tests for general relativity is the gravitational redshift of light or other forms of electromagnetic radiation. However, in contrast to the other two tests - the gravitational deflection of light and the relativistic perihelion shift -, you do not need general relativity to derive the correct prediction for the gravitational redshift. A combination of Newtonian gravity, a particle theory of light, and the weak equivalence principle (gravitating mass equals inertial mass) suffices. (...) The gravitational redshift was first measured on earth in 1960-65 by Pound, Rebka, and Snider at Harvard University..."
QED: The Strange Theory of Light and Matter: Richard P. Feynman: 9780691024172: Amazon.com: Books p. 15: "I want to emphasize that light comes in this form - particles. It is very important to know that light behaves like particles, especially for those of you who have gone to school, where you probably learned something about light behaving like waves. I'm telling you the way it does behave - like particles. You might say that it's just the photomultiplier that detects light as particles, but no, every instrument that has been designed to be sensitive enough to detect weak light has always ended up discovering the same thing: light is made of particles."
Explanation:
Reflection of light: Every light follows the law of reflection which states that the angle of incidence is equal to the angle of reflection.
Refraction of light: Refraction of light takes places when the light ray changes its velocity it passes from one medium to another. Index of refraction is used as a means to measure how much light refracts.
Dispersion: Dispersion of light is defined as the process in which the white light separates into different colours based on their wavelength when passed through a glass prism.