A spectrophotometer is a machine that measures how much light something takes in or lets out.
Spectrophotometers are used in science to learn about different materials.
Examples:
The scientist used a spectrophotometer to measure the light.
I saw a big spectrophotometer in the science lab.
The spectrophotometer helps scientists learn about colors.
The spectrophotometer is a big word!
The spectrophotometer can measure all the light in the world!
The spectrophotometer is a very important machine in the lab.