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Q.

What is the wavelength of visible spectrum?

[A] 1300A⁰-3000A⁰

[B] 3900A⁰-7600A⁰

[C] 7800A⁰-8000A⁰

[D] 8500A⁰-9800A⁰

Answer & Explanation
Answer: Option [B]

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