Why do markers reflect light, even when the light source fails to illumine the space between the source and markers?
Please see below screenshot of 15:59.The LED spot light (fastened to the front of the boat) illumines merely a few meters in front, and fails to illumine most of the water between the boat and the markers. So how can the LED still illumine the markers that I highlighted in orange?
It counters intuition that although a light fails to illumine the area between the source and the target, the light can still illumine SOLELY the target! Please correct my intuition?
I never studied science after secondary school. Please explain like I am (1)5.