Assertion: camera's light | /r/CapableOf | travel in straight line
Facets:
Source sentences:
text: The explanation is that light travels in a straight line and when some of the rays reflected from a bright subject pass through the small hole in thin material they do not scatter but cross and reform as an upside down image on a flat white surface held parallel to the hole.
text: He reiterated the same experience when he established that light travels in straight lines.