Why, at higher light intensities, gradually photosynthesis rate does not show further increase?

As the intensity of light increases, the rate of photosynthesis also increases. But at higher light intensity, the rate of photosynthesis decreases, because of the following reasons–
(i) other factors required for photosynthesis become limiting.
(ii) destruction of chlorophyll occurs, so there will be no carbohydrate (sugar) formation.