The sun is the biggest source of heat and light. It is very useful in our daily life.
Energy is the ability to do work. Energy can be converted from one form to another and can neither be destroyed nor created.
How is light formed?
The sun, stars, fireflies, glow worms, and deep sea fishes are natural lum ominous objects. Any object that emits is called a source. The sun and glow worms are natural light sources; candles, oil lamps, electric builds CFLs, fluorescent lamps, and tubes are made by humans and are called artificial light sources. Planets like Mercury, Venus, Earth, Mars, jupiter, Saturn, Uranus, Neptune, and our moon are some examples of nonluminous.
What is Light Energy: Definition, Types, Properties
Light provides energy to all plants and animals. We can differentiate between colors only when there is. Earlier, people used to estimate time only by. Today, we use LED bulbs and other electronic torches at night. The earlier people used to liger the fire filled our life with our life is impossible.
Speed of light
The speed of a vacuum is exactly 299 792 458 m/s (approx. 186,282 miles per second). The fixed value of the rate of SI units results from the fact that the meter is now defined in terms of speed. All forms of electromagnetic radiation move at the same rate in a vacuum.
Different physicists have attempted to measure the speed of throughout history. Galileo tried to measure the speed of the seventeenth century. An early experiment to measure the speed of was conducted by Ole Rømer, a Danish physicist, in 1676. Using a telescope, Rømer observed the motions of Jupiter and one of its moons, Io. Noting discrepancies in the apparent period of Io’s orbit, he calculated that it takes about 22 minutes to traverse the diameter of Earth’s orbit. However, its size was not known at that time. If Rømer had known the diameter of the Earth’s orbit, he would have calculated a speed of 227000000 m/s.
Light is one of the most important environmental factors affecting rice growth, development, and productivity . Shading stress caused by environmental pollution and climate change leads to changes in the morphology, physiology, biomass, grain yield, and quality of rice . Xie et al. [53,55] reported that shading declines grain filling rate, 1000grain weight, biomass, harvest index, nitrogen (N) uptake, and yield
Natural vs. Artificial Light
- Highlight the differences between natural and artificial light sources.
- Explain their respective advantages and disadvantages.
Lighting in Interior Design
- Explore the significance of lighting in interior spaces.
- Discuss various types of lighting fixtures and their applications.
The Role of Light in Photography
- Explain how it is essential in photography.
- Provide tips on using natural and artificial for better photos.
Light constitutes one of the most important environmental factors for plant growth and development. It determines the photosynthetic rate and accumulate-assimilation besides its regulatory roles in plant growth and productivity. Environmental metal pollution is a common problem threatening sustainable and safe crop production. Heavy metals (HMs) cause toxicity by targeting key molecules and life processes in plant cells. Plants counteract excess metals in the environment by enhancing defense responses, such as metal chelation, isolation to vacuoles, regulating metal intake through transporters, and strengthening antioxidant mechanisms. In recent years, microRNAs (miRNAs), as a small non-coding RNA,
Heat stress (HS) has become a major abiotic stress in rice, considering the frequency and intensity of extreme hot weather.
As the most sensitive component of plant cells, the structure and function of membranes are easily damaged by HS. HS alters the ratio of saturated to unsaturated fatty acids by decreasing the activities of fatty acid desaturases, thereby disrupting the integrity of the plasma membrane.
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