First slide
Heat transfer-Radiation
Question

The following figure shows two air-filled bulbs connected by a U-tube partly filled with alcohol What happened to the levels of alcohol in the limbs X and Y when an electric bulb placed midway between the bulbs is lighted?

Moderate
Solution

Black bulb will radiate more energy to the air column causing more expansion of air column in limb x. So alcohol level in limb x will fall.

Get Instant Solutions
When in doubt download our app. Now available Google Play Store- Doubts App
Download Now
Doubts App