| 1 | Second, they need to convert those photons into electrons as efficiently as possible. | |
| 2 | What is not easy to work out is exactly how many photons have arrived. | |
| 3 | If a photon, which has no mass, can behave as a particle --And we know this. | |
| 4 | When photons pass through or reflect off of something, they give that object momentum. | |
| 5 | With the transistor laser, researchers can explore the behavior of photons, electrons and semiconductors. |