When the voltage applied to an X-ray tube increases from 10 to 20 kV the wavelength difference between the ka line and the short wave cut-off of continuous X-ray spectrum increases by a factor of 3.0 . Identify the target element. Take 4/3R = 1200 Å where R is Rydberg’s contant and hc = 12.4 keV Å
In this section, you have one short passage . After this passage ,you will find several questions based on the passage. First, read passage, and answer the following questions based on it. The Aryans were keen hunters and caught lions and hunted boars with dogs . But Their favourite sport was racing in chariots drawn by swift horses . After the races , they had open - air dancing and singing .Like other ancient people , they worshipped at first many Gods of the storm .For a long time their chief God was Indra . As centured passed and the Aryans settled and developed their farming and trade in the conquered lands , the people became divided into four main castes , prescribed in ancient laws called the Manu Sanhita or the Laws of Manu . For a long time , the chief God of the Aryans was
