Class 10 Exam > Class 10 Questions > Find the incorrect statementa)Sun is visible ...
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Find the incorrect statement
- a)Sun is visible 2 minutes after sunrise and 2 minutes before sunset
- b)Refractive index of glass for violet colour is more than that for red colour
- c)Presbyopia occurs due to weakening of ciliary muscles
- d)Large sized particles scatter light of longer wavelengths
Correct answer is option 'A'. Can you explain this answer?
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Verified Answer
Find the incorrect statementa)Sun is visible 2 minutes after sunrise a...
Advance Sunrise and delayed sunset: This is due to atmospheric refraction. Because of this sun is visible about 2 minutes earlier than actual sunrise and about 2 minutes after the actual sun set.
Most Upvoted Answer
Find the incorrect statementa)Sun is visible 2 minutes after sunrise a...
Incorrect Statement: Sun is visible 2 minutes after sunrise and 2 minutes before sunset.
Explanation:
The statement is incorrect because of atmospheric refraction. Atmospheric refraction is the bending of light rays as they pass through the Earth's atmosphere. This bending of light causes an object to appear higher in the sky than it actually is. Hence, the sun is visible a few minutes before it rises and a few minutes after it sets.
The correct statement should be: The sun is visible a few minutes before it rises and a few minutes after it sets due to atmospheric refraction.
Other statements mentioned in the options are correct:
- Refractive index of glass for violet colour is more than that for red colour: This is correct. The refractive index of a medium is defined as the ratio of the speed of light in a vacuum to the speed of light in the medium. The refractive index of a medium depends on the wavelength of light. Since violet light has a shorter wavelength than red light, it bends more when passing through a medium like glass. Hence, the refractive index of glass for violet colour is more than that for red colour.
- Presbyopia occurs due to weakening of ciliary muscles: This is correct. Presbyopia is an age-related condition in which the eye's lens loses its flexibility, making it difficult to focus on close objects. Ciliary muscles are responsible for changing the shape of the lens to focus on objects at different distances. As we age, these muscles weaken, leading to presbyopia.
- Large sized particles scatter light of longer wavelengths: This is correct. Rayleigh scattering is the scattering of light by particles smaller than the wavelength of the light. This is why the sky appears blue, as blue light has a shorter wavelength than red light and is scattered more. However, larger particles like dust and smoke scatter light of longer wavelengths like red and orange, leading to a reddish or orangey sky during sunsets and sunrises.
Explanation:
The statement is incorrect because of atmospheric refraction. Atmospheric refraction is the bending of light rays as they pass through the Earth's atmosphere. This bending of light causes an object to appear higher in the sky than it actually is. Hence, the sun is visible a few minutes before it rises and a few minutes after it sets.
The correct statement should be: The sun is visible a few minutes before it rises and a few minutes after it sets due to atmospheric refraction.
Other statements mentioned in the options are correct:
- Refractive index of glass for violet colour is more than that for red colour: This is correct. The refractive index of a medium is defined as the ratio of the speed of light in a vacuum to the speed of light in the medium. The refractive index of a medium depends on the wavelength of light. Since violet light has a shorter wavelength than red light, it bends more when passing through a medium like glass. Hence, the refractive index of glass for violet colour is more than that for red colour.
- Presbyopia occurs due to weakening of ciliary muscles: This is correct. Presbyopia is an age-related condition in which the eye's lens loses its flexibility, making it difficult to focus on close objects. Ciliary muscles are responsible for changing the shape of the lens to focus on objects at different distances. As we age, these muscles weaken, leading to presbyopia.
- Large sized particles scatter light of longer wavelengths: This is correct. Rayleigh scattering is the scattering of light by particles smaller than the wavelength of the light. This is why the sky appears blue, as blue light has a shorter wavelength than red light and is scattered more. However, larger particles like dust and smoke scatter light of longer wavelengths like red and orange, leading to a reddish or orangey sky during sunsets and sunrises.
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Find the incorrect statementa)Sun is visible 2 minutes after sunrise and 2 minutes before sunsetb)Refractive index of glass for violet colour is more than that for red colourc)Presbyopia occurs due to weakening of ciliary musclesd)Large sized particles scatter light of longer wavelengthsCorrect answer is option 'A'. Can you explain this answer?
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Find the incorrect statementa)Sun is visible 2 minutes after sunrise and 2 minutes before sunsetb)Refractive index of glass for violet colour is more than that for red colourc)Presbyopia occurs due to weakening of ciliary musclesd)Large sized particles scatter light of longer wavelengthsCorrect answer is option 'A'. Can you explain this answer? for Class 10 2024 is part of Class 10 preparation. The Question and answers have been prepared according to the Class 10 exam syllabus. Information about Find the incorrect statementa)Sun is visible 2 minutes after sunrise and 2 minutes before sunsetb)Refractive index of glass for violet colour is more than that for red colourc)Presbyopia occurs due to weakening of ciliary musclesd)Large sized particles scatter light of longer wavelengthsCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Class 10 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Find the incorrect statementa)Sun is visible 2 minutes after sunrise and 2 minutes before sunsetb)Refractive index of glass for violet colour is more than that for red colourc)Presbyopia occurs due to weakening of ciliary musclesd)Large sized particles scatter light of longer wavelengthsCorrect answer is option 'A'. Can you explain this answer?.
Find the incorrect statementa)Sun is visible 2 minutes after sunrise and 2 minutes before sunsetb)Refractive index of glass for violet colour is more than that for red colourc)Presbyopia occurs due to weakening of ciliary musclesd)Large sized particles scatter light of longer wavelengthsCorrect answer is option 'A'. Can you explain this answer? for Class 10 2024 is part of Class 10 preparation. The Question and answers have been prepared according to the Class 10 exam syllabus. Information about Find the incorrect statementa)Sun is visible 2 minutes after sunrise and 2 minutes before sunsetb)Refractive index of glass for violet colour is more than that for red colourc)Presbyopia occurs due to weakening of ciliary musclesd)Large sized particles scatter light of longer wavelengthsCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Class 10 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Find the incorrect statementa)Sun is visible 2 minutes after sunrise and 2 minutes before sunsetb)Refractive index of glass for violet colour is more than that for red colourc)Presbyopia occurs due to weakening of ciliary musclesd)Large sized particles scatter light of longer wavelengthsCorrect answer is option 'A'. Can you explain this answer?.
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Find the incorrect statementa)Sun is visible 2 minutes after sunrise and 2 minutes before sunsetb)Refractive index of glass for violet colour is more than that for red colourc)Presbyopia occurs due to weakening of ciliary musclesd)Large sized particles scatter light of longer wavelengthsCorrect answer is option 'A'. Can you explain this answer?, a detailed solution for Find the incorrect statementa)Sun is visible 2 minutes after sunrise and 2 minutes before sunsetb)Refractive index of glass for violet colour is more than that for red colourc)Presbyopia occurs due to weakening of ciliary musclesd)Large sized particles scatter light of longer wavelengthsCorrect answer is option 'A'. Can you explain this answer? has been provided alongside types of Find the incorrect statementa)Sun is visible 2 minutes after sunrise and 2 minutes before sunsetb)Refractive index of glass for violet colour is more than that for red colourc)Presbyopia occurs due to weakening of ciliary musclesd)Large sized particles scatter light of longer wavelengthsCorrect answer is option 'A'. Can you explain this answer? theory, EduRev gives you an
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