Radiations coming from the Sun are mostly in the form of

Solar radiation, or insolation, consists of electromagnetic waves emitted by the Sun. This radiation is primarily composed of visible light, ultraviolet (UV) rays, and infrared (IR) radiation [1][3]. Specifically, the Sun's high surface temperature causes it to emit energy mostly in the form of short-wave radiation [1][3]. Within the infrared portion of the solar spectrum, the Sun emits 'near-infrared' radiation, which is characterized by shorter wavelengths compared to the 'long-wave' infrared radiation emitted by the cooler Earth [2][5]. Data indicates that the solar spectrum is roughly 42-43% visible light and 52-55% near-infrared light . While the Earth re-emits energy as long-wave thermal infrared, the incoming radiation from the Sun is dominated by visible light and short-wavelength (near) infrared [1][5]. Therefore, the Sun's radiations are mostly light and short-wavelength infrared.

Sources

1. [1] Physical Geography by PMF IAS, Manjunath Thamminidi, PMF IAS (1st ed.) > Chapter 21: Horizontal Distribution of Temperature > Insolation > p. 282
2. [3] Certificate Physical and Human Geography , GC Leong (Oxford University press 3rd ed.) > Chapter 14: Climate > lnsolation > p. 131
3. [2] FUNDAMENTALS OF PHYSICAL GEOGRAPHY, Geography Class XI (NCERT 2025 ed.) > Chapter 8: Solar Radiation, Heat Balance and Temperature > The Passage of Solar Radiation through the Atmosphere > p. 68
4. [5] https://www.sciencedirect.com/topics/physics-and-astronomy/solar-spectra