Two Electric bulbs have filaments of lengths 1 and 21, diameters 2d and d. The emissivity's of the bulbs are 3e, 4e with temperatures in the ratio 2:3. Their radiant powers will be in the ratio

Two Electric bulbs have filaments of lengths 1 and 21, diameters 2d an

1.	Two Electric bulbs have filaments of lengths 1 and 21, diameters 2d and d. The emissivity's of the bulbs are 3e, 4e with temperatures in the ratio 2:3. Their radiant powers will be in the ratio
Answer» `4:27` `8:9` `1:8` `2:9` ANSWER :A