Word wave puzzle no.9

Can you work out the word in this puzzle, which relates to a recent Physics World article?

Here’s how the game works:

1. 1. Enter a word guess – in this game the word has six letters.
   2. After submitting your guess, each letter in the guessed word is coloured to provide feedback:
      • Green:The letter is correct and is in the correct position in the target word.
      • Yellow:The letter is correct but is in the wrong position in the target word.
      • Grey:The letter is not in the target word at all.
   3. Using this colour feedback, refine your next guess.
   4. Continue guessing until you correctly identify the hidden word(s) or run out of attempts.

If you want a clue to the answer,read the article here.

Fancy some more? Check out ourpuzzles page.