Elements of Remote Sensing

51. The object of photo-interpretation is:

1. Identification
2. Recognition of objects
3. Judging the significance of objects
4. All of these

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52. The optical property of a water body depends on:

1. Absorption by the dissolved material
2. Absorption by the suspended particulate matter
3. Scattering by the suspended particulate matter
4. All of these

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53. The part radiation due to scattered/diffused radiation entering the field of view of a remote sensor other than that from the required target,

1. Reduces the contrast of the image and also its sharpness
2. Increases the contrast of the image but reduces the sharpness
3. Increases both the contrast and sharpness
4. Reduces the contrast but increases the sharpness

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54. The ratio of the total solar radiant energy returned by a planetary body to the total radiant energy incident on the body, the called:

1. Reflectance
2. Reflectance factor
3. Albedo
4. None of these

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55. The reflectance from a surface is called specular reflection if it follows:

1. Snell's law
2. Lambert's cosine law
3. Planktan's law
4. All of these

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56. The reflection of solar energy is characterised by the water content in the leaf, in the reflective optical infrared:

1. Visible (0.4 - 0.7 μm) region
2. Near-IR (0.7 - 1.3 μm) region
3. Short wave-IR (1.3 -2.7 μm) region
4. None of these

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57. The refractive index of the ocean water:

1. Increases with salinity
2. Increases with temperature
3. Decreases with salinity
4. Decreases with temperature

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58. The remote sensing techniques applied for the earth's surface features, is generally confined to the following wave lengths:

1. 0.4 to 1.3, 1.5 to 1.8, 2.2 to 2.6 μm
2. 2.2 to 2.3, 3.0 to 3.6, 4.2 to 5.0 μm
3. 4.2 to 5.0, 7.0 to 15.0 μm and 1 cm to 30 cm
4. All of these

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59. The spectral region of the electromagnetic radiation which passes through the atmosphere without much attenuation is known as:

1. Ozone hole
2. Atmospheric window
3. Ozone window
4. Black hole

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60. The value of energy quantum for radiation of any frequency is proportional to:

1. The frequency
2. The reciprocal of the energy
3. The square of the frequency
4. The square root of the frequency

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