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Vaishali Makker

UP Board 10th Class 2021 (For Hindi Medium Students)
About UP Board Crash Course
3 years ago

why our viens appear blue?

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Dileep Vishwakarma

3 years ago

Veins appear blue because blue light is reflected back to our eyes. ... Blue light does not penetrate human tissue as deeply as red light does. As a result, veins that are close to the surface of the skin will be more likely to reflect blue light back to the eye.”

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