What is light had always been mysterious for thinking people. Newton believed there are particles carrying light, explaining thereby why an obstacle in the light way creates a shadow on a screen. A century later, they discovered light is … Continue reading
It appears that periodical phenomena, e.g. waves are of utmost importance in nature. In practice, waves of different frequencies are superimposed so that the resulting periodical phenomenon is not of sinusoidal shape. Then, how can we deal with them … Continue reading
You know, electromagnetic waves bring information from the early Universe as well as provide the information exchange between our smartphones. In physics, to mathematically describe waves, we use so called complex exponential function. Its exponent includes an imaginary unit. … Continue reading
Precision here implies repetition of measurement to minimize deviation of the average result of the measurements from the expected value of physics quantity. Such deviation is normally caused by random (stochastic) errors. Nonetheless, this average value may still appreciably … Continue reading