When $170 \text{ J}$ of energy is incident on a surface of a body, $17 \text{ J}$ of energy is reflected by it. If the coefficient of absorption is $0.7$, then the amount of energy transmitted will be (in $\text{ J}$)

An ideal black body at room temperature is thrown into a furnace. It is observed that:

The following figure shows two air-filled bulbs connected by a $U$-tube partly filled with alcohol. One bulb is painted black and the other is painted white (or silver/shiny). What happens to the levels of alcohol in the limbs $X$ and $Y$ when an electric bulb placed midway between the two bulbs is lighted?

For a perfectly black body,its absorptive power is

The intensity of direct sunlight on a surface normal to the rays is $I_0$. What is the intensity of direct sunlight on a surface,whose normal makes an angle of $60^{\circ}$ with the rays of the sun?

If $e_\lambda$ and $a_\lambda$ are the emissive power and absorptive power of a body respectively,and $E_\lambda$ is the emissive power of a perfectly black body,what is the relation according to Kirchhoff's law?