Any energy - including light - has an associated mass.
photons
An object's mass (m) can be changed into energy (e). Albert Einstein gave us the conversion factor - the square of the speed of light (c2). E = mc2
contribution of nature of light in albert Einstein
Albert Einstein proposed the idea the light exists of quanta of energy that he called photons.
electrons
He studied : light , space/time , gravity and energy .
Albert Einstein did not invent the light bulb(neither did Thomas Edison).
Albert Einstein studied the theoretical branch of physics. This lead to his famous equation of energy equal mass times the speed of light squared.
E=mc2 in which E is energy, m is mass, and c is the space of light
E=mc2 E=energy m=mass c=speed of light Einstein's equation states that Energy equal mass times the speed of light squared
Albert Einstein did not invent the light bulb. You are thinking of Thomas Edison.
What formula, developed by Albert Einstein, describes the relationship between energy and matter? "Nuclear reactions convert matter into energy. In 1905, Albert Einstein developed a formula that described the relationship between energy and matter. You have probably seen this famous equation, E=mc2. In the equation, the E represents energy and m represents mass. The c, which represents the speed of light, is a very large number. This equation states that when matter is changed into energy, an enormous amount of energy is released."