“তুমি কি তোমার পালনকর্তাকে দেখ না, তিনি কিভাবে ছায়াকে বিলম্বিত করেন? সূরা আল-ফুরকান ৪৫-৪৬।

“তুমি কি তোমার পালনকর্তাকে দেখ না, তিনি কিভাবে ছায়াকে বিলম্বিত করেন? তিনি ইচ্ছা করলে একে স্থির রাখতে পারতেন। এরপর আমি সূর্যকে করেছি এর নির্দেশক। অতঃপর আমি একে নিজের দিকে ধীরে ধীরে গুটিয়ে আনি।”25) সূরা আল-ফুরকান ৪৫-৪৬।

Shadow is caused by the interception of light by an opaque body and is produced in the direction opposite to the source of light. If the source, like the sun, is not stationary, length and position of the shadow are also not stationary but are guided by the position of the sun, the source of light. The length of the shadow is inversely proportional to the tangent of the angle of incidence. So the smaller the angle of incidence, the larger the length of shadow. Thus in the morning the altitude of the sun is small and the shadow is large. As the altitude of the sun becomes higher, shadow gets smaller by stages. Again the shadow becomes larger by stages as the altitude of the sun gets smaller.These changes in the shadow produced by the sun, are ca laws ordained by Allah. The last part of this verse "if He willed He could make it is of great significance .

This could have happened on rotational motion was so slow that the earth made only one complete rotation around its axis by the time it completed one cycle in the orbit around the sun. In that case, one face of the can have been permanently exposed to the sun where shadows Wonk! have been stationary and the other side would have been permanently dark. Such a situation would have been catastrophic as the side permanently exposed to the sun would have been a burning desert and the dark side very freezing making it impossible for life to thrive on this planet earth under the extreme environmental conditions. Allah by his infinite mercy has endowed the earth with its spinning motion around its axis making the shadow grow and diminish in size. Thus no side of the earth is exposed to or away from the sun for a long period of time thus making the earths atmosphere very mild and congenial for life to thrive.