Answer:

Explanation:It is a common misconception that light has no energy because it has no mass. In fact, light has both energy and momentum, as explained by the theory of relativity. The energy of a photon (the smallest unit of light) is proportional to its frequency or inversely proportional to its wavelength, as given by the famous equation E=hf, where h is Planck's constant.

When sunlight reaches the Earth, it is absorbed by the atmosphere, oceans, and land surfaces. This absorption causes the temperature of these materials to increase, leading to the warming of the Earth. The energy of the absorbed light is converted into thermal energy, which is the energy associated with the motion of atoms and molecules in a substance.

The absorbed light energy causes the molecules in the Earth's surface to vibrate faster, which raises the temperature of the surface. This process is known as the greenhouse effect and is essential for maintaining a habitable temperature on Earth.

In summary, sunlight has energy, which is absorbed by the Earth's surfaces and converted into thermal energy, resulting in the warming of the Earth. The fact that light has no mass does not mean that it has no energy, as energy is a fundamental property of light and all other forms of electromagnetic radiation.

Answer:

It is a common misconception that Einstein stated that light has no energy because it has no mass. In fact, Einstein's famous equation, E=mc², shows that energy and mass are interchangeable, and that any object with mass has energy, even when it is not in motion.

Light, on the other hand, is massless and does not have rest mass. However, it does have energy, which is known as radiant energy or electromagnetic energy. This energy is transmitted by light as it travels through space or is absorbed by matter.

When sunlight reaches the Earth's atmosphere, it is absorbed by the Earth's surface, which converts the radiant energy into thermal energy or heat. This is because the energy from sunlight excites the molecules in the Earth's surface, causing them to vibrate and produce heat. This is why sunlight can warm the Earth without the need for mass.

In summary, Einstein's theory of relativity does not state that light has no energy. Instead, light is massless but has energy in the form of electromagnetic radiation, which can be converted into heat energy when it is absorbed by matter.