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

Example Input: Optics explains the behavior of visible light and electromagnetic waves.
Example Output: What type of physics explains the behavior of visible light and electromagnetic waves?

Example Input: In science, something that always applies under the same conditions is called a scientific law.
Example Output: In science, what do you call something that always applies under the same conditions?

Example Input: The most common two-lens telescope, like the simple microscope, uses convex lenses.
Example Output:
The most common two-lens telescope, like the simple microscope, uses lenses of what shape?