Question

We have two thermometers B and W. The bulb of B is painted black and that of W is silver white. Both of them are taken from a cold room and exposed to the sun. How will their readings change after the exposure:-
(1) Reading of B will increase faster than that of W
(2) Reading of B will increase slower than that of W
(3) Reading of both will increase in the same manner
(4) All are correct