Question

how do we detect smell of agarbatti

Answer 1

When the smell of the incense stick reaches our nose, then the olfactory receptors present in our nose detect it send this information to the fore brain in the form of electrical signals. Fore brain interprets this information as the smell ofincense stick where it is already stored

Answer 2

get the smell of agarbatti due to division when we burn the agarbatti then the smoke is high as a concentration in one corner but due to diffusion it spreads out in all the room so we detect the smell of Agarbatti