The phrase "reflection of sun" is correct and can be used in written English.
It refers to the way sunlight bounces off of an object and creates a glimmer or shine. Example: The calm lake was a beautiful sight, with the reflection of the sun sparkling on its surface.
A virtuoso color performance, the painting is an essay on the variations of white perceptible in the reflection of sun on crisp new snow.
His animation style is extremely delicate and realistic, as he makes sure to highlight details like the sparkling reflection of sun on water, the sluggish pace of a snail moving up a plant or a wisp of hair delicately blowing in the wind.
Also, the reflection of sun off of the water intensifies the sun and glare.
They result from multiple interior reflections of sun rays entering the hexagonal top face and leaving through the bottom face.
We predict the atmosphere will start to warm again after this temporary blip, and we think there are several contributing factors to the pause, including a change in movement of heat around the planet, a dip in the brightness of the sun, and reflection of the sun by pollution and volcanic eruptions — but we don't yet know the exact contributions of each.
Walking through the pavilion, with reflections of sun-dappled water playing on the underside of the roof, and breezes wafting through open walls, it was hard to tell interior from exterior.
"Is that the reflection of the sun or a smear of blood on the cobblestones?
Both factors add to warming because there was less reflection of the sun's rays back into space.
I looked out to the water, and the reflection of the sun on the waves blinded me.
From a light plane at five hundred feet, this is particularly evident as the reflection of the sun races through trees and shoots forth light from the water.
I liked that last part, so I changed the manuscript to say, "The reflection of the sun races through the trees and shoots forth light from the water".
