What is the range of the wavelength of electromagnetic waves that constitutes visible radiation?

24 Why is the use of wood as a fuel not advised although forests can be replenished? 25 How much solar energy will be received by 1m² area in one hour, if the solar constant were 1.4 kilowatt per square metre? 27 Name the component of sunlight that mainly carries heat with it. 28 Name any two components of solar radiation that are not visible to us.