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The Vertical Ray of the Sun (Vietnamese: Mùa hè chiều thẳng đứng, French: À la verticale de l'été) is the third feature film by Vietnamese-born French director Trần Anh Hùng. It was released in 2000 and is the final part of what many now consider to be Tran's "Vietnam trilogy."
The solar zenith angle is the zenith angle of the sun, i.e., the angle between the sun’s rays and the vertical direction.It is the complement to the solar altitude or solar elevation, which is the altitude angle or elevation angle between the sun’s rays and a horizontal plane.
Sun path, sometimes also called day arc, refers to the daily (sunrise to sunset) and seasonal arc-like path that the Sun appears to follow across the sky as the Earth rotates and orbits the Sun. The Sun's path affects the length of daytime experienced and amount of daylight received along a certain latitude during a given season.
Lāhainā Noon, also known as a zero shadow day, is a semi-annual tropical solar phenomenon when the Sun culminates at the zenith at solar noon, passing directly overhead. [1] As a result, the sun's rays will fall exactly vertical relative to an object on the ground and cast no observable shadow. [2]
The solar azimuth angle is the azimuth (horizontal angle with respect to north) of the Sun's position. [1] [2] [3] This horizontal coordinate defines the Sun's relative direction along the local horizon, whereas the solar zenith angle (or its complementary angle solar elevation) defines the Sun's apparent altitude.
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At this point, the Sun's rays will fall exactly vertical relative to an object on the ground and thus cast no observable shadow. [ 2 ] To an observer on a planet with an orientation and rotation similar to those of Earth , the subsolar point will appear to move westward with a speed of 1600 km/h, completing one circuit around the globe each day ...