Which statement about infra red radiation is correct? A. Infra red has the shortest wavelength in the electromagnetic spectrum. B. Infra red is emitted by humans. C. Infra red is next to radio waves in the electromagnetic spectrum. D. White objects absorb more infra red than black objects. Your answer ________________

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Which statement about infra red radiation is correct? A - OCR Gateway - GCSE Physics - Question 3 - 2021 - Paper 1

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Which statement about infra red radiation is correct? A. Infra red has the shortest wavelength in the electromagnetic spectrum. B. Infra red is emitted by humans. ... show full transcript

Worked Solution & Example Answer:Which statement about infra red radiation is correct? A - OCR Gateway - GCSE Physics - Question 3 - 2021 - Paper 1

Step 1

Infra red has the shortest wavelength in the electromagnetic spectrum.

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Answer

This statement is incorrect because ultraviolet radiation has a shorter wavelength than infrared radiation.

Step 2

Infra red is emitted by humans.

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Answer

This statement is correct. Humans emit infrared radiation due to body heat. This is a fundamental principle in thermography.

Step 3

Infra red is next to radio waves in the electromagnetic spectrum.

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Answer

This statement is incorrect. Infrared radiation is adjacent to visible light, not radio waves. The order is radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays.

Step 4

White objects absorb more infra red than black objects.

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Answer

This statement is also incorrect. Black objects absorb more infrared radiation compared to white objects, which reflect more light and heat.

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Which statement about infra red radiation is correct? A - OCR Gateway - GCSE Physics - Question 3 - 2021 - Paper 1

Worked Solution & Example Answer:Which statement about infra red radiation is correct? A - OCR Gateway - GCSE Physics - Question 3 - 2021 - Paper 1

Infra red has the shortest wavelength in the electromagnetic spectrum.

Infra red is emitted by humans.

Infra red is next to radio waves in the electromagnetic spectrum.

White objects absorb more infra red than black objects.

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