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Answers in fundamental physics

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Tag Archives: light

What is a supernova explosion?

Posted on August 4, 2021 by admin
How do supernovae fade out

  Supernova explosions are rather rare events so the last one seen by the naked eye in our galaxy was described by Johannes Kepler in 1604. For several months, that was the brightest star in the sky so one can … Continue reading →

When do we confuse frequencies?

Posted on July 17, 2021 by admin
Redshift of a distant galaxy

  The speed of sound waves as well as the speed of light is not changed by the motion of a source of waves. For example, when a sound source moves towards a listener, each next vibration reaches the listener’s … Continue reading →

How else to sort monochromatic waves?

Posted on July 16, 2021 by admin
Transmittence and reflectance for polarized waves

  The electric field strength of light waves coming from the Sun is of course oriented randomly. There were found some transparent compounds which allow a light wave to pass through only having definite direction of the wave field strength. … Continue reading →

How was the Soviet physics born?

Posted on October 11, 2020 by admin
Direct communication with geniuses gave rise to the Soviet school of physics

  Behind the Iron Curtain, Soviet physicists worked actively and nevertheless made a number of fundamental discoveries. At first, however, they were not isolated from the world — they learned from and worked with European scientists. One of the founding … Continue reading →

How to distinguish between distant and close galaxies?

Posted on September 1, 2014 by admin
Distant galaxies look larger

Increasing the visible size keeping the same amount of light emitted When we look at a distant source of light that spreads in all directions, we see only a portion of the photons emitted by it. As the distance from … Continue reading →

Does the speed of light depend on the speed of its source?

Posted on August 27, 2014 by admin
Interference fringes of light in the experiment measuring its speed

On the indifference of photons to the velocity of their own source Crucial in this regard was the experiment conducted by Michelson and Morley in 1887 in Cleveland, Ohio. There were observed fringes formed by the interference of light passing … Continue reading →

Why did they use to say “we are in aether”?

Posted on August 25, 2014 by admin
Hypothetical aether found its place in the World Wide Web -- the Internet

On the difference of radio waves from the sound vibrations in the air Light and sound — that is what from time immemorial people imagined like something flying or self-spreading. Following the ancient scholars, in the Renaissance they believed that … Continue reading →

Who has guessed the first that light propagates in portions?

Posted on August 25, 2014 by admin
The electrons are knocked out of the electron shells of atoms with photons

On the emission of quanta of light waves — photons In 1905, Albert Einstein proposed a far-reaching generalization of Planck’s hypothesis of discrete radiation and successfully applied it to explain the properties of the photoelectric effect. Initially, these Einstein’s views … Continue reading →

Is there any reason to trust the scientific imagination?

Posted on August 24, 2014 by admin
The laser beam is used for very many purposes

Doing real that exists in fantasies A striking example of the implementation of the human imagination is a laser. The power of a narrow beam of light has long been intuitively realized by people and was immortalized in the novels … Continue reading →

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