guys tell me in thar desert day temp is 50 and nght is 15

what must be the reason?????

Generally the deserts are situated away from cost and there are no much of vegitations in deserts. So the humidity of the air there will be very very low. Also there will be not many clouds. Due to this the green house effect which is responsible for night temp. will be very less. Also the heat carrying capacity of the air will be less due to low humidity.

During day time in absence of sea breeze and vegitation the earth gets very hot and in turn due to convection air also gets heated up.

HOPE I AM RIGHT

sand is really close to being a perfect black body,the faster it absorbs the radiations during the day nd according to kirchoffs law good absorbers r good emitters,so sand also emits heat away n that is the cause of cooling