The tilt of the earth causes it to expose the northern and southern hemispheres to more or less sunlight depending on the placement of the earth within its orbit.
No. It changes every day.
The length of a day is primarily controlled by the rotation of the Earth on its axis. The Earth takes approximately 24 hours to complete one full rotation, which determines the length of a day. Variations in the Earth's rotation speed can result in minor changes in the length of a day.
The length of day and night
Everywhere: the length of the day is always 24 hours irrespective of latitude & longitude since the angular rotation of the planet is 360º per 24hours. The DAYLIGHT length changes seasonally and proportionally to latitude, but the DAY length is constant.
The seasonal changes in day length that are least important typically occur in regions near the equator, where day lengths remain relatively consistent throughout the year. In these areas, the variation in daylight is minimal, making seasonal changes less impactful on daily life, agriculture, and wildlife behavior compared to regions farther from the equator. Additionally, the transition between seasons in these equatorial regions often does not significantly influence climate or ecosystems, as they experience a more stable environment year-round.
At the equator, day length remains relatively constant throughout the year, with each day lasting approximately 12 hours. This consistency occurs because the equator is positioned evenly between the poles, resulting in minimal variation in the angle of sunlight as the Earth orbits the Sun. While other regions experience significant changes in day length with the seasons, the equatorial region maintains this stable pattern due to its geographic location.
The length of day & night are exactly 12 hours each. This never changes.
If the sun increases in size but nothing else changes, then there will be no change in the lengths of day and night. However, the gravitational and tidal effects of changes in the sun's size is likely to affect the earth's rotational period and its orbit.
This response is called, photoperiodism.
due to elliptical shape of earth,the size of days and night are vary
The protoreceptor that allows plants to detect day length is called phytochrome. Phytochromes are photoreceptors that absorb light, particularly in the red and far-red spectrum, and play a crucial role in regulating various aspects of plant growth and development, including flowering time in response to changes in day length. They help plants determine the length of day and night, influencing their physiological responses to seasonal changes.
Nothing can change the length of day and night except the normal seasonal progression.