In Chapter 10 we found that an infinite amount of energy is required to accelerate a massive particle to the speed of light. What does this imply about the mass of a photon?
....like vanished
maybe we should have called it a wave?
The trick is stopping it to weigh it.
In fact it has ZERO rest mass but does have momentum and energy at speed. Therefore you can assign mass from E = m c^2 for example.
Google "momentum of photon"
To understand the implication of the energy required to accelerate a massive particle to the speed of light, we need to consider Einstein's theory of relativity. According to this theory, the mass of an object increases as it approaches the speed of light. This phenomenon is described by the famous equation E = mc^2, where E represents the energy, m represents the mass, and c represents the speed of light.
In Chapter 10, it is stated that an infinite amount of energy is needed to accelerate a massive particle to the speed of light. This implies that the mass of an object with a rest mass (mass at rest) cannot reach or exceed the speed of light. If it could, an infinite amount of energy would be required, which is impossible.
Now, let's consider the case of a photon, which is a massless particle of light. Since a photon has no rest mass, it can travel at the speed of light without requiring any additional energy. Its mass is considered to be zero according to the theory of relativity.
Therefore, the implication of an infinite amount of energy required to accelerate a particle to the speed of light is that the mass of a photon is zero. This result is consistent with experimental observations and supports Einstein's theory of relativity.