Each point on wavefront acts as secondary source — Explains reflection, refraction, diffraction wave-theoretically. Wavefront envelope gives new wavefront.

KAS Prelims Mixed Practice Test #197

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Q1.The highest point of a transverse wave is called the:‌‍

A. Antinode B. Trough C. Node D. Crest

Q2.Second Anglo-Sikh War:

A. 1848-49 B. 1857 C. 1803 D. 1780

Q3.The Kundara Proclamation of 1809 called upon the people to:

A. Pay taxes promptly B. Rise against the British C. Support the Zamorin D. Worship at temples

Q4.Huygens principle:‌‍

A. No interference B. No diffraction C. Light is particle D. Each point on wavefront acts as secondary source

Q5.Granary of Kerala:‌‍

A. Thrissur B. Palakkad C. Kottayam D. Idukki

Q6.'My brother is interested ___ reading science fictions.'

A. in B. on C. at D. with

Q7.When sound waves go from air (rarer) to water (denser), the speed:‌‍

A. Stays same B. Decreases C. Becomes zero D. Increases

Q8.The Human Genome Project, completed in 2003, mapped approximately how many genes?‌‍

A. ~100,000 B. ~5,000 C. ~1 million D. ~20,000-25,000

Q9.Sundarban largest in:‌‍

A. Bangladesh only B. Myanmar C. India only D. India-Bangladesh

Q10.Synonym of INNOCUOUS:

A. Harmful B. Harmless C. Dangerous D. Bad

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KAS Prelims Mixed Practice Test #197