Standard Science Primary 4 Energy

Jun Jie placed an opaque object between a torch and a screen. He noticed a dark area on the screen. What is this dark area called and why is it formed?

A A shadow; because light passes through the object.
B A shadow; because light is blocked by the opaque object.
C A reflection; because the screen is shiny.
D A reflection; because light bounces off the object.
Show Worked Solution

Worked Solution

Step 1: Light travels in straight lines. Step 2: When light hits an opaque object, it is blocked. Step 3: The absence of light behind the object forms a shadow. Step 4: Final Answer: Shadow formed by blocked light.

Correct answer: A shadow; because light is blocked by the opaque object.

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