#physics

speed Why is the speed of light regarded as the universal speed limit?

According to Einstein's theory of special relativity, the speed of light is the universal speed limit. This means that nothing can travel faster than... Read more

contact_support What is the difference between Lorentz's and Einstein's theories of relativity?

Lorentz's theory of relativity was developed in the late 19th and early 20th century, while Einstein's theory of relativity was published in 1905 and... Read more

waves Can sound waves travel through space?

Sound is the result of vibrations that propagate through a medium such as air, water, or solid materials. In space, there is no air, and thus no... Read more

science How do you calculate the kinetic and potential energy of an object?

Kinetic energy is the energy an object possesses due to its motion, while potential energy is the energy an object possesses due to its position or... Read more

waves What is the difference between a redshift and a blueshift?

Redshift and blueshift are two important concepts in physics and astronomy. They are related to the Doppler effect, which is the change in the... Read more

speed What is the speed of light?

The speed of light is a fundamental physical constant, denoted by the letter c. It is the speed at which electromagnetic radiation (such as light)... Read more

science What is the theory of relativity, and did Einstein ever express doubts about its correctness?

The theory of relativity is a set of two interrelated physical theories proposed by Albert Einstein. The first one, called special relativity, was... Read more

record_voice_over How do vibrating objects produce sound waves that travel through different media, such as air, water, and solids?

Sound is a type of energy that travels through different media, such as air, water, and solids. Vibrating objects, such as vocal cords or the strings... Read more

scatter_plot If I move at the speed of light and throw a stone forward, would it travel faster than light?

According to Einstein's theory of special relativity, the speed of light is an absolute limit that cannot be exceeded. This means that no matter how... Read more

wb_sunny How is the sun expected to evolve in the future?

The sun is a main sequence star, which means that it is in a stable phase of its evolution. However, as it continues to burn hydrogen in its core, it... Read more