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Which of the following statements is fal...

Which of the following statements is false about cones?
I. The daylight (photopic) vision and colour are function of cones
II. In human eye, there are three types of cones having characteristic photopigments that respond to red, green and blue líght
III. The sensations of different colours are produced by various combination of these 3 types of cones
IV. When these 3 types of cones are stimulated equally, a sensation of white light is produced

A

Only IV

B

Only I and IV

C

Only III

D

None

Text Solution

AI Generated Solution

The correct Answer is:
To determine which statement about cones is false, we will analyze each statement one by one. ### Step-by-Step Solution: 1. **Statement I**: "The daylight (photopic) vision and colour are function of cones." - **Analysis**: This statement is true. Cones are responsible for color vision and function best in bright light (daylight). They enable us to see colors clearly. 2. **Statement II**: "In human eye, there are three types of cones having characteristic photopigments that respond to red, green and blue light." - **Analysis**: This statement is also true. Human eyes have three types of cones: - L-cones (long wavelengths, red light) - M-cones (medium wavelengths, green light) - S-cones (short wavelengths, blue light) Each type has a specific photopigment that is sensitive to these colors. 3. **Statement III**: "The sensations of different colours are produced by various combinations of these 3 types of cones." - **Analysis**: This statement is true as well. The brain interprets different combinations of signals from the three types of cones to produce the perception of various colors. 4. **Statement IV**: "When these 3 types of cones are stimulated equally, a sensation of white light is produced." - **Analysis**: This statement is true. When all three types of cones are stimulated equally, the brain perceives this as white light. ### Conclusion: After analyzing all four statements, we find that all of them are true. Therefore, there is no false statement among the options provided. ### Final Answer: None of the statements are false. ---
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