photon meter

例句：

1. 1. The photon meter is used to measure the intensity of light.
   光子计用于测量光的强度。
2. 2. The photon meter was used to detect the presence of radiation.
   光子计被用来检测辐射的存在。
3. 3. The photon meter was used to measure the energy of the light.
   光子计被用来测量光的能量。