Explain the role of light in flowering.

(N/A) In many plants,a specific duration of light is required to induce or promote flowering. This phenomenon is known as photoperiodism.
Plants have the ability to measure the duration of light exposure.
For example,some plants,known as long-day plants,require exposure to light for a duration exceeding a critical period to flower.
Conversely,other plants,known as short-day plants,require exposure to light for a duration less than a critical period to flower.
Some plants,called day-neutral plants,are not affected by the duration of light exposure for flowering.