Physics

\(\pi\)Nm\(^{-2}\)

2\(\pi\)Nm\(^{-2}\)

4\(\pi\)Nm\(^{-2}\)

8\(\pi\)Nm\(^{-2}\)

A man supports a heavy load on his head with hands.

A woman holds a pot of water

A boy climbs onto a table

A man pushes against a stationary petrol tanker

7.5

15.5

30.0

60.0

reflection

refraction

dispersion

diffraction

7f

6f

15f

0.17f