A tungsten filament in a light bulb operates at

PHYSICS · Single correct · A Level · Physics · Further mechanics and thermal physics · Further mechanics and thermal physics

Problem

2.8\times10^{3}\,\text{K}

. Using the constant

2.9\times10^{-3}\,\text{m}\cdot\text{K}

, which of the following is closest to the peak wavelength of the radiation it emits? (a)

5.2\times10^{-7}\,\text{m}

(green light) (b)

1.0\times10^{-6}\,\text{m}

(near infrared) (c)

1.0\times10^{-5}\,\text{m}

(far infrared) (d)

3.0\times10^{-6}\,\text{m}

(mid-infrared)