Question

select the correct answer.
a light source is made to pass through a narrow slit in a window. how do you think the light rays will travel?
a. the light rays will travel in straight lines.
b. the light rays will bend completely at one corner of the slit.
c. the light rays will spread in all directions.
d. the light rays will not pass through the narrow slit.

Explanation:

Light travels in straight lines in a homogeneous medium (like air) when not encountering obstacles that cause significant diffraction (the slit here is narrow but the key principle for basic understanding is rectilinear propagation initially, and even with diffraction, the main path is straight - option B is incorrect as bending completely at one corner is not how light behaves, C is incorrect as light doesn't spread in all directions from a slit in the way described (diffraction is a spread but not all directions), D is incorrect as light does pass through a narrow slit. So the correct answer is A as light travels in straight lines.

Answer:

A. The light rays will travel in straight lines.