visible and near-infrared radiometer

visible Adjective

— If something is visible, it can be seen. The car had no visible signs of damage. Many stars that are not visible in the city are still visible from the countryside. is clearly visible from Tokyo after a rain storm. Italy has an active and highly visible environmental movement.

and Conjunction

— You use and to talk about two things at once. I like singing and reading. Mary and Jane went on a holiday together. — You use and when you are listing a few things and you are now on your last item of the list. I like singing, reading, cycling and playing soccer. I used to like this girl from my class as she is pretty, gentle and caring. — And is used when you are putting two sentences together. She came into the store, shouted at the cashier, and left. — Used to show what happened after something else. The alarm went off and I woke up. — And is used to join certain numbers together. Two hundred and thirty-five people went missing after the earthquake.

near Preposition

— With a small distance between; close. The end is near. She lives near me. The house is near the beach.

near Adjective

— Almost It was a near miss, but the car didn't hit us. — Close The nearest thing to me is my family. We'll be meeting again in the near future.

near Verb

— To come close to, approach. We neared the beach.

infrared

— adjective having or employing wavelengths longer than light but shorter than radio waves; lying outside the visible spectrum at its red end infrared radiation infrared photography — noun the infrared region of the electromagnetic spectrum; electromagnetic wave frequencies below the visible range they could sense radiation in the infrared — noun electromagnetic radiation with wavelengths longer than visible light but shorter than radio waves

radiometer

— noun meter to detect and measure radiant energy (electromagnetic or acoustic)