Question

When a blackened bulb thermometer is moved beyond the red region of the visible spectrum, there is a rapid rise in the temperature. This is due to the presence of ______.

विकल्प

• Infrared radiations

• Ultraviolet radiations

• X-rays

• Radio waves

Answer 1

When a blackened bulb thermometer is moved beyond the red region of the visible spectrum, there is a rapid rise in the temperature. This is due to the presence of infrared radiations.

Explanation:

A blackened bulb thermometer exhibits a fast increase in temperature when placed beyond the red area of the visible spectrum, due to infrared radiation. These invisible, longer-wavelength radiations possess a significant heating effect, which is effectively absorbed by the bulb’s black coating.