science
Grade-1
Easy
Question
We are able to play mobile games by looking at a cell phone’s screen because ____.
- It emits light that it gets from elsewhere
- It emits light of its own
- It reflects light
- None of the above
Hint:
We are able to play mobile games by looking at a cell phone’s screen because it emits light.
The correct answer is: It emits light of its own
- Mobile phone emits visible light of short wavelength.
- This emitted light goes into our eyes and we can see it.
- It also emits bright blue light.
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