The light reaction of photosynthesis requires water (H2O), chlorophyll, and light.
CO2 is used in the dark reaction (Calvin cycle).
O2 is a product of photosynthesis.
A bob of heavy mass \(m\) is suspended by a light string of length \(l\). The bob is given a horizontal velocity \(v_0\) as shown in figure. If the string gets slack at some point P making an angle \( \theta \) from the horizontal, the ratio of the speed \(v\) of the bob at point P to its initial speed \(v_0\) is :