Kamal al-Din Hasan ibn Ali ibn Hasan al-Farisi or Abu Hasan Muhammad ibn Hasan (1267– 12 January 1319, long assumed to be 1320)) (Persian:كمالالدين فارسی) was a prominent Muslim scientist. He made two major contributions to science, one on optics, the other on number theory. Farisi was a pupil of the great astronomer and mathematician Qutb al-Din al-Shirazi, who in turn was a pupil of Nasir al-Din Tusi.
His work on optics was prompted by a question put to him concerning the refraction of light. Shirazi advised him to consult the Book of Optics of Ibn al-Haytham (Alhacen), and Farisi made such a deep study of this treatise that Shirazi suggested that he write what is essentially a revision of that major work, which came to be called the Tanqih. Qutb al-Din Al-Shirazi himself was writing a commentary on works of Avicenna at the time.
Farisi is known for giving the first mathematically satisfactory explanation of the rainbow, and an explication of the nature of colours that reformed the theory of Ibn al-Haytham Alhazen. Farisi also "proposed a model where the ray of light from the sun was refracted twice by a water droplet, one or more reflections occurring between the two refractions." He verified this through extensive experimentation using a transparent sphere filled with water and a camera obscura.
Theatre or theater is a collaborative form of fine art that uses live performers to present the experience of a real or imagined event before a live audience in a specific place, often a stage. The performers may communicate this experience to the audience through combinations of gesture, speech, song, music, and dance. Elements of art and stagecraft are used to enhance the physicality, presence and immediacy of the experience. The specific place of the performance is also named by the word "theatre" as derived from the Ancient Greek θέατρον (théatron, "a place for viewing"), itself from θεάομαι (theáomai, "to see", "to watch", "to observe").
The song is a Ralph Siegel-Bernd Meinunger collaboration, with Ebstein singing about the manner in which clowns have to mask their true feelings when performing on stage - a situation which is said to be true of all performers. The four backing singers were dressed as clowns and Ralph Siegel played the piano on stage wearing gloves with small clowns on the fingers. Ebstein also recorded the song in English (as "It's Showtime"), French ("Théâtre") and Italian ("Teatro").
The Theater District is a popular tourist attraction in New York City. According to The Broadway League, Broadway shows sold a record US$1.36 billion worth of tickets in 2014, an increase of 14% over the previous year. Attendance in 2014 stood at 13.13 million, a 13% increase over 2013.
The great majority of Broadway shows are musicals. Historian Martin Shefter argues, "'Broadway musicals,' culminating in the productions of Richard Rodgers and Oscar Hammerstein, became enormously influential forms of American popular culture" and helped make New York City the cultural capital of the nation.