Correct Answer:
B. Reflection of solar energy from Earth’s surface.
The Albedo Effect refers to the reflection of solar energy from Earth’s surface. Albedo is a measure of the reflectivity of a surface or object, expressed as a fraction or percentage of the incident solar radiation that is reflected rather than absorbed. Surfaces with high albedo, such as fresh snow and ice, reflect a large proportion of sunlight, appearing bright. Conversely, darker surfaces like oceans, forests, and asphalt have low albedo, meaning they absorb more solar energy and reflect less. The Earth's overall albedo plays a critical role in its energy balance and directly influences global temperatures, with changes in albedo (e.g., due to melting ice) having significant implications for climate change.
- Option A, Absorption of heat by oceans, describes a process where oceans, due to their low albedo, absorb solar energy. While related, it is not the definition of the Albedo Effect itself, which focuses on reflection.
- Option C, Melting of polar ice caps, is a consequence of global warming and a factor that reduces Earth's albedo, but it is not the definition of the Albedo Effect.
- Option D, Radiation emitted by electronic devices, is entirely unrelated to the Albedo Effect, which pertains to solar radiation and planetary reflectivity.