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Illuminance diagram with units and terminology. In photometry, illuminance is the total luminous flux incident on a surface, per unit area. [1] It is a measure of how much the incident light illuminates the surface, wavelength-weighted by the luminosity function to correlate with human brightness perception. [2]
[1] In the autobiography, Kalam examines his early life, effort, hardship, fortitude, luck and chance that eventually led him to lead Indian space research, nuclear and missile programs. Kalam started his career, after graduating from Aerospace engineering at Madras Institute of Technology , at Hindustan Aeronautics Limited and was assigned to ...
In Hinduism, Ahalya (Sanskrit: अहल्या, IAST: Ahalyā) also spelt as Ahilya, is the wife of the sage Gautama Maharishi.Many Hindu scriptures describe her legend of seduction by the king of the gods Indra, her husband's curse for her infidelity, and her liberation from the curse by the god Rama.
For simplicity, "reflections" are spoken of here, but more generally the interface between the small particles that constitute many materials is irregular on a scale comparable with light wavelength, so diffuse light is generated at each interface, rather than a single reflected ray, but the story can be told the same way.
Early forms of present-day Hindustani developed from the Middle Indo-Aryan apabhraṃśa vernaculars of present-day North India in the 7th–13th centuries. [33] [38] Hindustani emerged as a contact language around the Ganges-Yamuna Doab (Delhi, Meerut and Saharanpur), a result of the increasing linguistic diversity that occurred during the Muslim period in the Indian subcontinent.
The President of India is the supreme commander of the nation's armed forces; with 1.45 million active troops, they compose the world's second-largest military. It comprises the Indian Army, the Indian Navy, the Indian Air Force, and the Indian Coast Guard. [288] The official Indian defence budget for 2011 was US$36.03 billion, or 1.83% of GDP ...
As of 2016, 400 million people spoke English as their first language, and 1.1 billion spoke it as a secondary language. [70] English is the largest language by number of speakers . English is spoken by communities on every continent and on islands in all the major oceans.
Diagram illustrating how the uterus lining builds up and breaks down during the menstrual cycle Menstruation (also known as a period, among other colloquial terms) is the regular discharge of blood and mucosal tissue from the inner lining of the uterus through the vagina. The menstrual cycle is characterized by the rise and fall of hormones. Menstruation is triggered by falling progesterone ...