Final answer:
Clouds or eclipses can cause temporary decrease in sunlight.
Step-by-step explanation:
Explanation for Temporary Decrease in Sunlight
A possible scientific explanation for a temporary decrease in sunlight for a 30 minute period could be the presence of clouds. Clouds can block or scatter sunlight, leading to a decrease in the amount of sunlight reaching the Earth's surface. This can happen when there is a passing cloud or a cloud cover that temporarily obscures the Sun.
Another possible explanation could be an eclipse. During a solar eclipse, the Moon passes between the Sun and the Earth, casting a shadow on certain areas of the Earth. This can result in a temporary decrease in sunlight for the duration of the eclipse, which is typically a few minutes.