What is the title, observation, conclusion, and applications of an experiment demonstrating that light travels in a straight line?

a)
i. An appropriate title for the experiment is:

• Light travels in a straight line

ii. If the middle board is shifted:

• The light from the candle will not reach the observer's eye.

iii. The conclusion the students can draw from the experiment is:

• Light travels in straight lines.

iv. Two applications of the experiment demonstrated above are:

• Formation of shadows
• Working of a pinhole camera