Question
Part of the solar radiation incident on the water surface gets refracted as per
The correct answer is
Snell's law
Understanding Refraction with Snell's Law
When solar radiation travels from one medium (like air) to another (like water), it changes direction. This phenomenon is called refraction.
Governing Law of Refraction
The specific physical law that describes how light bends when it crosses the boundary between two different media, such as the water surface, is Snell's law.
- Snell's law relates the angle of incidence and the angle of refraction to the refractive indices of the two media.
- It explains that the path of light is altered due to the change in the speed of light in different materials.
Therefore, the refraction of solar radiation incident on the water surface is explained by Snell's law.
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Important Questions from Principle Used
- The total irradiance on a Lambertian surface is $540 \text{ W m}^{-2}$. The reflectance of the surface is 20%. The path radiance from the atmosphere towards the sensor is $2.5 \text{ W m}^{-2} \text{ sr}^{-1}$. The transmissivity of the atmosphere is 80%. The radiance reaching the sensor is ________ $\text{W m}^{-2} \text{ sr}^{-1}$ (Rounded off to the nearest integer).
- Which one of the following is responsible for attenuation of the incoming solar radiation in the atmosphere?
- For 3D-positioning, Global Navigational Satellite System (GNSS) requires a
minimum of ________ satellites.
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