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Consider the following statements.
- The colour of the ocean depends on the absorption and scattering of light.
- When the sunlight falls on deep and clear water, colours with shorter wavelengths are absorbed by the water molecules and which have a much longer wavelength, are reflected back.
- In some parts, the oceans appear green due to the existence of phytoplankton on the upper surface of the water.
How many of the above statements are correct?
- a)Only one
- b)Only two
- c)All three
- d)None
Correct answer is option 'B'. Can you explain this answer?
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Consider the following statements. The colour of the ocean depends on ...
Explanation:
The correct answer is option 'B', i.e., only two of the statements are correct.
Statement 1: The colour of the ocean depends on the absorption and scattering of light.
This statement is correct. The color of the ocean is determined by the way water molecules absorb and scatter light. Different colors of light have different wavelengths, and when light interacts with water, certain colors are absorbed while others are scattered. This absorption and scattering of light give the ocean its characteristic color.
Statement 2: When the sunlight falls on deep and clear water, colors with shorter wavelengths are absorbed by the water molecules and those with much longer wavelength are reflected back.
This statement is correct. When sunlight falls on deep and clear water, the water molecules absorb colors with shorter wavelengths (such as blue and violet) more readily than colors with longer wavelengths (such as red and orange). This is why the ocean appears blue because the blue light is scattered and reflected back to our eyes.
Statement 3: In some parts, the oceans appear green due to the existence of phytoplankton on the upper surface of the water.
This statement is incorrect. While it is true that the presence of phytoplankton can affect the color of the ocean, it does not result in a green color. Phytoplankton are microscopic plants that are often found in the upper layers of the ocean. They contain chlorophyll, a pigment that gives them a green color. However, when phytoplankton are present in large numbers, they can create a phenomenon known as a "red tide" or "algae bloom," which can give the water a reddish or brownish color, not green.
Hence, only two of the above statements are correct.
The correct answer is option 'B', i.e., only two of the statements are correct.
Statement 1: The colour of the ocean depends on the absorption and scattering of light.
This statement is correct. The color of the ocean is determined by the way water molecules absorb and scatter light. Different colors of light have different wavelengths, and when light interacts with water, certain colors are absorbed while others are scattered. This absorption and scattering of light give the ocean its characteristic color.
Statement 2: When the sunlight falls on deep and clear water, colors with shorter wavelengths are absorbed by the water molecules and those with much longer wavelength are reflected back.
This statement is correct. When sunlight falls on deep and clear water, the water molecules absorb colors with shorter wavelengths (such as blue and violet) more readily than colors with longer wavelengths (such as red and orange). This is why the ocean appears blue because the blue light is scattered and reflected back to our eyes.
Statement 3: In some parts, the oceans appear green due to the existence of phytoplankton on the upper surface of the water.
This statement is incorrect. While it is true that the presence of phytoplankton can affect the color of the ocean, it does not result in a green color. Phytoplankton are microscopic plants that are often found in the upper layers of the ocean. They contain chlorophyll, a pigment that gives them a green color. However, when phytoplankton are present in large numbers, they can create a phenomenon known as a "red tide" or "algae bloom," which can give the water a reddish or brownish color, not green.
Hence, only two of the above statements are correct.
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Community Answer
Consider the following statements. The colour of the ocean depends on ...
Statement 2 is incorrect.
- In most regions across the world, the oceans appear blue or navy blue for a reason. This happens due to “the absorption and scattering of light,” according to a report by NASA. When the sunlight falls on deep and clear water, colours with longer wavelengths, such as red, yellow and green, are absorbed by the water molecules but blue and violet, which have a much shorter wavelength, are reflected back.
- “When sunlight hits the ocean, some of the light is reflected back directly but most of it penetrates the ocean surface and interacts with the water molecules that it encounters. The red, orange, yellow, and green wavelengths of light are absorbed so that the remaining light we see is composed of the shorter wavelength blues and violets”.
- But when the water isn’t deep or clean, an ocean can appear to be of a different colour. For instance, along Argentina’s coastline, where major rivers merge into the Atlantic Ocean, the ocean exudes a brown tint because of dead leaves and sediments spewing from the rivers. In other parts of the world, the oceans appear green, which happens due to the existence of phytoplankton on the upper surface of the water.
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Consider the following statements. The colour of the ocean depends on the absorption and scattering of light. When the sunlight falls on deep and clear water, colours with shorter wavelengths are absorbed by the water molecules and which have a much longer wavelength, are reflected back. In some parts, the oceans appear green due to the existence of phytoplankton on the upper surface of the water.How many of the above statements are correct?a)Only oneb)Only twoc)All threed)NoneCorrect answer is option 'B'. Can you explain this answer?
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Consider the following statements. The colour of the ocean depends on the absorption and scattering of light. When the sunlight falls on deep and clear water, colours with shorter wavelengths are absorbed by the water molecules and which have a much longer wavelength, are reflected back. In some parts, the oceans appear green due to the existence of phytoplankton on the upper surface of the water.How many of the above statements are correct?a)Only oneb)Only twoc)All threed)NoneCorrect answer is option 'B'. Can you explain this answer? for UPSC 2024 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about Consider the following statements. The colour of the ocean depends on the absorption and scattering of light. When the sunlight falls on deep and clear water, colours with shorter wavelengths are absorbed by the water molecules and which have a much longer wavelength, are reflected back. In some parts, the oceans appear green due to the existence of phytoplankton on the upper surface of the water.How many of the above statements are correct?a)Only oneb)Only twoc)All threed)NoneCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for UPSC 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Consider the following statements. The colour of the ocean depends on the absorption and scattering of light. When the sunlight falls on deep and clear water, colours with shorter wavelengths are absorbed by the water molecules and which have a much longer wavelength, are reflected back. In some parts, the oceans appear green due to the existence of phytoplankton on the upper surface of the water.How many of the above statements are correct?a)Only oneb)Only twoc)All threed)NoneCorrect answer is option 'B'. Can you explain this answer?.
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