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physics

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If you are sitting at home in your room, the walls

please help me pick one best answer of the followings.

1. emit visible light with a peak wavelength close to 0.5 micrometer.

2. emit thermal radiation in the near infrared with a peak wavelength close to 1 micrometer.

3. emit thermal radiation in the mid-infrared with a peak wavelength close to 10 micrometer.

4. emit thermal radiation in the far-infrared with a peak wavelength close to 100 micrometer.

5. emit ultraviolet radiation with a peak wavelength close to 0.3 micrometer.

6. only reflect light and don’t emit anything.

  • physics -

    i don't understand the question could you please repeat the first part of your question

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