Yellow is the color between orange and green on the spectrum of visible light. It is evoked by light with a dominant wavelength of 570–590 nm, it is a primary color in subtractive color systems, used in color printing. In the RGB color model, used to create colors on television and computer screens, yellow is a secondary color made by combining red and green at equal intensity. Carotenoids give the characteristic yellow color to autumn leaves, canaries and lemons, as well as egg yolks and bananas, they protect plants from photodamage. Sunlight has a slight yellowish hue when the Sun is near the horizon, due to atmospheric scattering of shorter wavelengths; because it was available, yellow ochre pigment was one of the first colors used in art. Ochre and orpiment pigments were used to represent gold and skin color in Egyptian tombs in the murals in Roman villas. In the early Christian church, yellow was the color associated with the Pope and the golden keys of the Kingdom, but it was associated with Judas Iscariot and used to mark heretics.

In the 20th century, Jews in Nazi-occupied Europe were forced to wear a yellow star. In China, bright yellow was the color of the Middle Kingdom, could be worn only by the emperor and his household. According to surveys in Europe and the United States, yellow is the color people most associate with amusement, gentleness and spontaneity, but with duplicity, jealousy, and, in the U. S. cowardice. In Iran it has connotations of pallor/sickness, but wisdom and connection. In China and many Asian countries, it is seen as the color of happiness, glory and wisdom; the word yellow comes from the Old English geolu, meaning "yellow, yellowish", derived from the Proto-Germanic word gelwaz "yellow". It has the same Indo-European base, gʰel -, as yell; the English term is related to other Germanic words for yellow, namely Scots yella, East Frisian jeel, West Frisian giel, Dutch geel, German gelb, Swedish and Norwegian gul. According to the Oxford English Dictionary, the oldest known use of this word in English is from The Epinal Glossary in 700.

Yellow is found between orange on the spectrum of visible light. It is the color the human eye sees when it looks at light with a dominant wavelength between 570 and 590 nanometers. In color printing, yellow is one of the three colors of ink, along with magenta and cyan, along with black, can be overlaid in the right combination, along with black, to print any full color image.. A particular yellow is used, called Process yellow subtractive primary colors, along with magenta and cyan. Process yellow is not an RGB color, there is no fixed conversion from CMYK primaries to RGB. Different formulations are used for printer's ink, so there can be variations in the printed color, pure yellow ink; the yellow on a color television or computer screen is created in a different way. Traditionally, the complementary color of yellow is purple. Vincent Van Gogh, an avid student of color theory, used combinations of yellow and purple in several of his paintings for the maximum contrast and harmony. Hunt defines that "two colors are complementary when it is possible to reproduce the tristimulus values of a specified achromatic stimulus by an additive mixture of these two stimuli."

That is, when two colored lights can be mixed to match a specified white light, the colors of those two lights are complementary. This definition, does not constrain what version of white will be specified. In the nineteenth century, the scientists Grassmann and Helmholtz did experiments in which they concluded that finding a good complement for spectral yellow was difficult, but that the result was indigo, that is, a wavelength that today's color scientists would call violet or purple. Helmholtz says "indigo blue" are complements. Grassmann reconstructs Newton's category boundaries in terms of wavelengths and says "This indigo therefore falls within the limits of color between which, according to Helmholtz, the complementary colors of yellow lie."Newton's own color circle has yellow directly opposite the boundary between indigo and violet. These results, that the complement of yellow is a wavelength shorter than 450 nm, are derivable from the modern CIE 1931 system of colorimetry if it is assumed that the yellow is about 580 nm or shorter wavelength, the specified white is the color of a blackbody radiator of temperature 2800 K or lower.

More with a daylight-colored or around 5000 to 6000 K white, the complement of yellow will be in the blue wavelength range, the standard modern answer for the complement of yellow. Because of the characteristics of paint pigments and use of different color wheels, painters traditionally regard the complement of yellow as the color indigo or blue-violet. Lasers emitting in the yellow part of the spectrum are less common and more expensive than most other colors. In commercial products diode pumped. An infrared laser diode at 808 nm is used to pump a crystal of neodymium-doped yttrium vanadium oxide or neodymium-doped yttr

Louis Greatorex

Louis Greatorex is an English actor from Duffield, Derbyshire. His television credits include the BBC1 drama series Last Tango in Halifax, in which he has played Lawrence since 2012. Greatorex is from Duffield, the son of an IT professional and an HR administrator, he has one younger brother called Dominic Greatorex. Louis attended secondary school at the Ecclesbourne School in Duffield. From a young age Greatorex attended local drama workshops, including the Nottingham branch of the Central Junior Television Workshop, his theatre experience whilst attending the television workshop includes a role in a pantomime production of Peter Pan, portraying the title role in a production of The Ritual Slaughter of Gorge Mastromas at Nottingham Contemporary. Greatorex has experience of street theatre, having been named'miming champion' at the Derby Arts festival in 2010, he made his professional television debut in a 2010 episode of the situation comedy series The Legend of Dick and Dom. He had a small role in the romantic comedy film My Last Five Girlfriends, released in 2010.

Greatorex has portrayed the character of Lawrence in Last Tango in Halifax since 2012. He was put forward for his audition by the Central Junior Television Workshop, though missed the audition due to suffering from flu and losing his voice, he had to be persuaded by his family to attend the audition and did not expect to win the part due to symptoms of his illness. As of 2015, Greatorex had signed with a London-based casting agency. In January 2015 he stated that he would like to pursue an acting career alongside his further education, having applied to study English Literature in 2015. Louis Greatorex on IMDb


The SU-152G is a Soviet experimental 152-mm self-propelled howitzer, is designed by OKB-3 of the heavy machine construction division of Uralmash. The main designer of the SU-152G is Lev Gorlitsky; the SU-152G was intended to suppress and destroy enemy firing positions, engage armored hostiles as well as area denial, in addition to conducting counter-battery tasks. At the end of the second World War in 1945, the USSR started to seek a new anti-tank and assault gun; the main concept of the said gun is to be able to defeat armored vehicles with directly-launched shells. At that time the western world and the US were developing artillery capable of firing from closed positions; these artillery began to replace the towed guns that had once been used. The irreplaceable position of self-propelled guns in local conflicts became obvious. Despite the artillery used by the USSR were fitted with necessary sighting adaptations for firing from closed positions, the maximum barrel elevation of these artillery were at maximum only 15-20 degrees.

This hampered the performance of self-propelled artillery when compared with the towed ones. From the angle of ranged strike capabilities, the main threats of self-propelled artillery were German Waffenträgers armored self-propelled anti-tank cannons, some models of which were taken by the Soviet army in the spring of 1945. Using data of these artillery, OKB-3 under L. I. Gorlitsky prepared two projects for the new artillery. Decree No. 2252-935 of the USSR was issued on 22 June 1948. OKB-3 commenced the designing of the SU-152G in accordance with the decree; the designing of the SU-152G was handled by OKB-3, while the cannon, the D-50/D-1 was developed by OKB-9. The first experimental model of the artillery was completed in March 1948, was handed over to the military representatives of the factory on 16 June 1948. Two more D-50/D-1 cannons were made by factory No. 9 till 31 December 1948. The SU-152G, together with the SU-100P anti-tank gun, was directed to undergo factory testing. A total driving distance of 865 km was included in the test, as well as an 88- and a 51-round firing volley.

Results of the test showed that the rate of fire and the performance of the SU-152G was satisfactory. However, a number of defects regarding the design of rubber-metal hinges, which were used in Soviet armored vehicles for the first times, there were problems with the tracks as well. After the tests the SU-152G underwent state trials; the SU-152G, together with the SU-100P and the SU-152P took part in state trials, which revealed flaws in the chassis of the SU-100P. Improvements of the basic chassis and elimination of identified flaws continued until June 1955, after which the SU-100P and the SU-152G were adopted into service by the Soviet Army, but most of the work on self-propelled guns were called off by Khrushchev in 1955, which rendered the SU-152G unable to enter mass production; the SU-152G uses an open turret mounted on the hull. The hull was welded from rolled homogeneous armor and is divided into 3 compartments: the power compartment which houses the transmissions and the engine, the driving compartment and the combat compartment.

The engine and the transmissions were housed in the front right part of the vehicle. To its left were the driving mechanisms with chassis controls. In the middle of the vehicle was the combat compartment, is equipped with armored shielding; the ammo rack is located to the rear, analogous to that of the SU-100P. The gun is located on the turret above the hull; the turret had a traverse range of 71.5 degrees to either the left or the right, the maximum elevation range was from -5 to +40 degrees. The entire vehicle needed a crew of 5 to operate; the armor was made to withstand shrapnel damage. The armor for the hull was 25 mm thick; the main armament of the SU-152G was the D-50/D-1 152-mm howitzer. It was unified for ballistic characteristics, internal mechanisms and ammunition with the D-1 152 mm towed howitzer; the barrel was connected to the breech, a muzzle brake was fitted to the barrel. A vertical, wedged gate was installed in the breech, along with a semi-automatic, free-floating ejector. To ease the loading process, a mechanical loader was placed as well.

The gunner's seat has a ZIS-3 panoramic sight for firing from closed positions, an OP1-7 direct-firing sight for observation of shell impact. The ammo rack of the SU-152G was capable of holding 42 shells; the main shell employed by the D-50/D-1 was the 53-OF-530 High Explosive Fragmentation shell fitted with an RGM, RGM-2 or a D-1 fuse. When fired with full propellant charge, the shells had a muzzle velocity of 508 meters per second with a maximum range of 12.39 km. The 53-OF-530 has 5.83 kg of TNT as payload. When equipped with a contact fuse, it was capable of a 2100-square-meter area denial against enemy infantry in a standing profile, was able to create a crater up to 1.2 m deep and up to 3.5 m in diameter. For greater effect against infantry the 53-O-530A fragmentation round was used with an RGM-2 or D-1-U fuse, or the 53-OF-530R High Explosive Fragmentation shell and the 3OF9, armed with AR-26 and AR-30 radio-controlled fuses, respectively. For anti-tank fire the SU-152G was capable of using 53-BP-540 HEAT shells, with a penetration capability of up to 250 mm of Rolled Homogeneous Armor at a range of up to 3 km.

Naval High-Explosive, Semi-Armor-Piercing A3-PB-35 shells were available, with the capability of penetrating 68 mm of RHA at a range of 2 km. The range of choice included special-purpose shells, which include illumination rounds, smoke shells, concrete-piercing shells and chemical shells. 4Zh5 and 54-Zh-536M propella