Advanced Science Primary 4 Energy

An opaque object was placed between a torch and a screen. If the torch is moved closer to the object, what happens to the size of the shadow on the screen?

A The shadow becomes larger.
B The shadow remains the same size.
C The shadow becomes smaller.
D The shadow disappears.
Show Worked Solution

Worked Solution

Step 1: Light travels in straight lines. Step [2-9]: When the source is closer to the object, it blocks a wider angle of light rays. Step [2-9]: This results in a larger shadow being cast on the screen.

Correct answer: The shadow becomes larger.

Want more questions like this? Superholic Lab has 10,000+ MOE-aligned questions with full worked solutions.

Start Free Trial — 7 Days Free