Solar Radiation and Energy

Water's high specific heat means it can absorb large amounts of heat energy with minimal temperature change, making it ideal for thermal regulation in plants. Combined with its ready availability, this makes it perfect for dissipating excess solar energy.

A photocell (photoelectric cell) works on the photoelectric effect: when light strikes certain materials, it ejects electrons, creating an electric current. Thus light energy is directly converted into electrical energy without any intermediate steps.

Sun rays reach Earth through radiation - the transfer of energy through electromagnetic waves across the vacuum of space. Conduction and convection require a medium (solid, liquid, or gas), which doesn't exist in the vacuum between the Sun and Earth. Diffusion is not relevant to solar energy transfer.

Multiple energy sources drove the chemical reactions that led to life's origin. UV radiation from the sun, lightning discharges (electric charge), and geothermal heat (high temperature) all provided the energy needed to synthesize complex organic molecules from simpler inorganic compounds, as demonstrated by the Miller-Urey experiment.

The Sun is primarily composed of hydrogen (about 73% by mass) and helium (about 25% by mass), with trace amounts of heavier elements. These gases undergo nuclear fusion in the Sun's core, producing enormous energy. Note: the Sun 'burns' through nuclear fusion, not chemical burning.

Global dimming is the gradual reduction in the amount of global direct irradiance at the Earth's surface that was observed for several decades after the start of systematic measurements in the 1950s. The effect varies by location, but worldwide it has been estimated to be of the order of a 4% reduction over the three decades from 1960–1990.

A solar cell (also called a photovoltaic cell) is an electrical device that converts the energy of light directly into electricity by the photovoltaic effect.

Carbon dioxide is a greenhouse gas that absorbs infrared radiation from the sun and traps heat in Earth's atmosphere, causing the greenhouse effect and increasing global temperatures. Oxygen, noble gases, and nitrogen do not have significant infrared-absorbing properties like CO2 does.

The hydrologic cycle, or water cycle, is directly driven by solar energy, which provides the heat necessary for evaporation and transpiration. While other cycles involve biological and geological processes, water evaporation is primarily solar-powered. Therefore, the hydrologic cycle is the correct choice among the given options.

Sun is a huge sphere of hot gases with a very high temperature and is a source of all the heat and light energy on earth.

Sunflower is a C₄ plant and is able to photosynthesise in high light intensity and excessive heat. They keep their stomata partially closed and are able to absorb carbon dioxide of as low a concentration as 2ppm. Hence, their productivity is higher than C₃ plants.

This is the correct answer as all statements are correct.

Water can get evaporated easily if direct sunlight is provided to the water body, but if water is present in the shade, where there are no direct sun rays falling, warm air is required to heat the water so as to evaporate it into vapours.

Sun, stars and fireflies are the examples of natural sources of light and also the luminous object. Moon is also a natural source of light through it is non-luminous. Electric bulb, torch streetlight and candle are not natural object as they are being industrially prepared but as they emit their own light so are known as artificial source of light.

Sun, stars and fireflies are the examples of natural sources of light and also the luminous object. Moon is also a natural source of light through it is non-luminous. Electric bulb, torch streetlight and candle are not natural object as they are being industrially prepared but as they emit their own light so are known as artificial source of light. So it is the moon which is a natural source of light.