Infrared Waves — Prelims Questions

Which of the following statements about infrared waves is INCORRECT?

Which of the following applications primarily utilizes the thermal properties of infrared radiation?

An object at $300,\text{K}$ emits infrared radiation with a peak wavelength $lambda_{max}$. If the object's temperature is increased to $600,\text{K}$, what will be the new peak wavelength of its emitted radiation?

Which region of the electromagnetic spectrum is used for detecting 'hot spots' in electrical circuits or for medical thermography?

Which of the following is NOT a common source of infrared radiation?

The wavelength range of infrared radiation is approximately: