14 days. of rain. Singapore's total amount of rain for April has varied over the years from 18 inches (455 mm) to less than an inch (17 mm). Usually the day's heaviest rainfall this time of year occurs around 5 pm.Sunlight in April at Singapore lasts for 12 hours and 8 minutes a day on average.That amounts to 364 hours of daylight for the month. The relative humidity in Singapore during April ranges throughout the day from an average maximum of 97 percent to an average minimum of 63 percent.ingapore's total amount of rain for April has varied over the years from 18 inches (455 mm) to less than an inch (17 mm).
1 An example of light energy is the movement of a radio signal. 2  An example of light energy is the energy in the brain that transmits signals for movement, memory, speech and hearing.
The wavelength of light determines its color. For example, The wavelength of red is about 700 nm and the wavelength of blue light is about 470 nm. Visible light is a part of a larger spectrum of radiation called the electromagnetic spectrum.Plants require visible light with wavelengths in the range of 400 to 700 nanometers for growth and photosynthesis Ultraviolet radiation (UV) is dangerous to cells because it breaks chemical bonds.hey do not participate directly in photosynthetic reactions but are able to pass their energy to chlorophyll a. Visible Light is one small part of the electromagnetic spectrum. Electromagnetic Spectrum is a set of types of radiation. Radiation is energy that travels and spreads out as it goes.