WAEC - Physics (1995 - No. 23)
Light travels in straight lines. In which of the following is this principle manifested? I. Pinhole camera II Formation of shadows III. Diffraction of light IV. Occurrence of eclipse
I and III only
II and III only
I, II and III only
I, II and IV only
I, II, III and IV
Paliwanag
I, II, and IV are correct because they manifest the principle that light travels in a straight light while III is not correct because diffraction of light is the bending of light wave around an obstacle.