Hi Tony,Originally Posted by [b
no, it is not a myth. Although plants like Nepenthes don't show it - this might be due to the fact they are growing in the tropics where they have to cope with this situation. Main concern normally is with more sensible forms of grass (don't water when sun is out) and cacti after dark winters they stood inside.
The refraction index of water is different from the refraction index of air, so due to its shape a bulb of water works like a normal lense of glass. In a physics book you'll find how these lenses work.