Choose the correct options for each question. There may be several correct options in each question.
About this exercise type...What is the name of the law describing the refraction of light?
| — | Snell's Law. |
| — | Avogadro's Law. |
| — | Lambert's Law. |
Select the equations that relate to this law.
| — | n1 sin(q1) = n2 sin(q2) |
| — | n = c0 / c |
| — | n = c / l |
What factors are required for refraction to take place?
| — | An interface between media of different optical densities. |
| — | Incident light at an angle to the normal. |
| — | Light of short wavelength. |
Under what circumstances is light refracted towards the normal?
| — | When passing into an optically denser medium. |
| — | When passing into an optically lighter medium. |
| — | At high angles of incidence. |
The degree of refraction that takes place
| — | is larger at shorter wavelengths. |
| — | is larger at longer wavelengths. |
| — | is independent of wavelength. |
| — | is only slightly dependent on wavelength. |
In the atmosphere refraction depends on
| — | air density. |
| — | air humidity. |
| — | air temperature. |
| — | air pollution. |
| — | air turbulence. |
Which of the following factors make refraction important in remote sensing?
| — | Refraction occurs at the interfaces between atmospheric layers. |
| — | Light paths through the atmosphere cannot be considered as straight lines. |
| — | Refraction varies depending on atmospheric characteristics. |
In the atmosphere refraction is greatest at the boundary of
| — | the stratosphere and the troposphere. |
| — | the mesosphere and the stratosphere. |
| — | the troposphere and the boundary layer. |
Which of these phenomena are the direct result of atmospheric refraction?
| — | The perceived solar zenith angle is larger than it really is. |
| — | The Sun's shape is distorted at low solar zenith angles. |
| — | The perceived times of sunrise and sunset are different from their astronomical times. |
| — | The sky appears blue. |
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