Questions

The Ozone layer which is present in the Earth's atmosphere protects it by restricting from UV or Ultraviolet radiation, the dangerous rays contained by Sun.

A filament is a metal wire that glows when electricity is channeled into it. The filament of an electric bulb is made of Tunsten. 

Because of its high melting point and its greatest tensile strength, it makes for a good filament in light bulbs.

The Golaknath Case of 1967 relates to the power of the Parliament to curtail the Fundamental Rights provided in the Constitution.In 1967, the Supreme Court reversed its earlier decisions in Golaknath v. State of Punjab. It held that Fundamental Rights included in Part III of the Constitution are given a "transcendental position" and arebeyond the reach of Parliament. It also declared any amendment that "takes away or abridges" a Fundamental Right conferred by Part III as unconstitutional. By 1973, the basic structure doctrine triumphed in Justice Hans Raj Khanna's judgment in the landmark decision of Kesavananda Bharati v. State of Kerala.