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#infrared waves

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Infrared, Visible Light and Applications

Why do infrared waves contribute to the greenhouse effect on Earth?

**IR effectiveness in remote sensing** because IR scattered less than visible by atmosphere, can detect heat signatures, used in satellite imaging for vegetation, moisture, military night vision, illustrating application based on thermal emission and low scattering. Infrared waves emitted by the Earth's surface are absorbed and trapped by greenhouse gases, leading to an increase in atmospheric temperature, a phenomenon known as the greenhouse effect. Using c = fλ, E₀/B₀ = c, I_d = ε₀ dΦ_E/dt, and spectrum classification λ = c/f, evaluation yields They are trapped by greenhouse gases, illustrat

Ref: NCERT > Physics Book > Electromagnetic Waves > Infrared, Visible Light and Applications

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Infrared, Visible Light and Applications

What is the wavelength range of infrared waves as per the document?

**IR effectiveness in remote sensing** because IR scattered less than visible by atmosphere, can detect heat signatures, used in satellite imaging for vegetation, moisture, military night vision, illustrating application based on thermal emission and low scattering. The document states that infrared waves range from 1 mm to 700 nm . Using c = fλ, E₀/B₀ = c, I_d = ε₀ dΦ_E/dt, and spectrum classification λ = c/f, evaluation yields 1 mm to 700 nm, illustrating EM wave transverse nature and Maxwell's displacement current concept.

Ref: NCERT > Physics Book > Electromagnetic Waves > Infrared, Visible Light and Applications

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Infrared, Visible Light and Applications

What explains the effectiveness of infrared waves in remote sensing applications?

**Infrared waves** λ≈700 nm to 1 mm, f≈10¹² to 4×10¹⁴ Hz, produced by hot bodies and molecular vibrations, wavelength range as per document 700 nm-1 mm, used in remote sensing because IR penetrates haze, thermal imaging detects IR emitted by objects, remote controls, effective for sensing temperature. Infrared waves interact with materials based on their temperature and composition, allowing remote sensing devices to detect variations in heat signatures or material properties. Using c = fλ, E₀/B₀ = c, I_d = ε₀ dΦ_E/dt, and spectrum classification λ = c/f, evaluation yields Thermal interaction,

Ref: NCERT > Physics Book > Electromagnetic Waves > Infrared, Visible Light and Applications

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