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primary 6 | Science
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Huan Jing Ong
Huan Jing Ong

primary 6 chevron_right Science

I don't understand the question

Date Posted: 6 years ago
Views: 528

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Bernice Liang
Bernice Liang's answer
9 answers (Tutor Details)
1st
The answer is 2.

In Set up P, light reaches 20cm (sheet B), So that means Sheet A allows light to pass through.
However it does reach Sheet C, thus Sheet B does not let light pass through.

In Set Up Q, Sheet C is placed in front of B, and light reaches 30cm (where Sheet B is), this means Sheet C also allows light to pass through.

Light does not reach Sheet D in both set ups so we are not able to conclude if light can pass through.