Given scientific fact as input, generate the question from this fact such that it can be answered from the input.

Wave amplitude and wavelength are two important measures of wave size.
Wave amplitude and wavelength are two important measures of what?

Wilting occurs when water lost by transpiration is not replaced by absorbtion from room.
What occurs when water lost by transpiration is not replaced by absorbtion from room?

A plane mirror has a flat reflective surface and forms only virtual images.
A plane mirror has a flat reflective surface and forms only which kind of images?