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A hologram is an image that appears to be three dimensional and which can be seen with the naked eye. Holography is the science and practice of making holograms. Typically, a hologram is a photographic recording of a light field, rather than an image formed by a lens.

Nylon is a generic designation for a family of synthetic polymers, based on aliphatic or semi-aromatic polyamides. Nylon is a thermoplastic silky material that can be melt-processed into fibers, films or shapes.

Rectilinear propagation describes the tendency of Electromagnetic waves to travel in a straight line.
Light only deviates from a straight line when the medium it is travelling through changes density. This is called refraction.
Reflection- the throwing back by a body or surface of light, heat, or sound without absorbing it.
Diffraction- the process by which a beam of light or other system of waves is spread out as a result of passing through a narrow aperture or across an edge, typically accompanied by interference between the wave forms produced.

Radiocarbon dating (also referred to as carbon dating or carbon-14 dating) is a method for determining the age of an object containing organic material by using the properties of radiocarbon, a radioactive isotope of carbon.

Malaria is a mosquito-borne infectious disease that affects humans and other animals.
Malaria causes symptoms that typically include fever, tiredness, vomiting, and headaches. In severe cases, it can cause yellow skin, seizures, coma, or death.
Malaria is caused by single-celled microorganisms of the Plasmodium group. The disease is most commonly spread by an infected female Anopheles mosquito. The mosquito bite introduces the parasites from the mosquito’s saliva into a person’s blood.
The parasites travel to the liver where they mature and reproduce. Five species of Plasmodium can infect and be spread by humans. Most deaths are caused by P. falciparum, whereas P. vivax, P. ovale, and P. malariae generally cause a milder form of malaria. The species P. knowlesi rarely causes disease in humans.

Alkaloids are a class of basic, naturally occurring organic compounds that contain at least one nitrogen atom.
Alkaloids have diverse and important physiological effects on humans and other animals.
Well-known alkaloids include morphine, strychnine, quinine, ephedrine, and nicotine.
Caffeine is xanthine alkaloid that occurs naturally in seeds, leaves and fruit of several plants and trees that acts as a natural pesticide.
Caffeine is a major component of coffee, tea and chocolate and in humans acts as a central nervous system (CNS) stimulant.

Diseases and diagnostic tests

Typhoid : Widal test
Tuberculosis : Dot test
Leprosy: Lepromin test
Dengue fever: tourniquet test

The Indian Space Research Organization , abbreviated as ISRO, was established on 15 August 1969 as the National Space Research Organization of India.
The first Chairman of ISRO – Dr. Vikram Sarabhai
ISRO’s 100th mission, PSLV-C21, was successfully launched from the Satish Dhawan Space Center, Sriharikota on September 9, 2012 at 9:51 am.
In addition to local needs, the company also provides international rocket launch services.
S. Somanath is the current (2023) Chairman of ISRO.

Biogenesis is the production of new living organisms or organelles. Conceptually, biogenesis is primarily attributed to Louis Pasteur and encompasses the belief that complex living things come only from other living things, by means of reproduction.

The plant with largest leaves in the world is Raphia regalis.
Raphia regalis is a species of flowering plant in the family Arecaceae.
It is found in Angola, Cameroon, Republic of the Congo, Gabon, and Nigeria.
Its natural habitat is subtropical or tropical moist lowland forests. It is threatened by habitat loss.

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