Light, lenses and the prism
Answers are for parents and teachers.
1
How many seconds does light take to travel 900 000 km at 300 000 km/s?
3
2
A pool is really 8 m deep. About how deep does it look when viewed straight from above? (3/4 of the real depth)
6
3
Find 3 objects at home that work as lenses (spectacles, a magnifier, a water-filled glass, etc.).
For example spectacles, a magnifier, a phone camera, a water drop.
4
Why does a black object heat up faster in the Sun than a white one? Explain with absorption and reflection.
A black object absorbs most light and so heats up; a white one reflects most of it.