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State and explain two differences between the perceived image of a brightly coloured object in bright light and the perceived image of the same object when viewed in very dark conditions - AQA - A-Level Physics - Question 1 - 2020 - Paper 6
Question 1
State and explain two differences between the perceived image of a brightly coloured object in bright light and the perceived image of the same object when viewed in... show full transcript
Worked Solution & Example Answer:State and explain two differences between the perceived image of a brightly coloured object in bright light and the perceived image of the same object when viewed in very dark conditions - AQA - A-Level Physics - Question 1 - 2020 - Paper 6
Step 1
Difference 1: Visual Receptors Utilization
Answer
In bright light, the eye relies predominantly on cones, which are responsible for high-resolution color vision and function well in well-lit conditions. Conversely, in very dark conditions, the eye utilizes rods, which are sensitive to low light, allowing for peripheral vision but providing no color distinction, resulting in a grayscale perception.
Step 2
Difference 2: Resolution and Image Clarity
Answer
Bright light conditions enable a sharp and high-resolution image due to the functionality of cones. However, in dark conditions, the reliance on rods leads to lower resolution and less clarity, often resulting in a blurry perception of the object.