Niha afzal Posted March 27, 2016 Share Posted March 27, 2016 Two parts are correct ... A ) INDEED the speed of electromagnetic waves in vaccum is same.... 3×10^8.their speed only changes when medium changes. D).THE FREQ of infra red is greater than u.v ... Now how do I go about this problem Link to comment Share on other sites More sharing options...
studiot Posted March 27, 2016 Share Posted March 27, 2016 (edited) D).THE FREQ of infra red is greater than u.v ... Check this. Since you got that one wrong, can you say why B and C are wrong? Edited March 27, 2016 by studiot Link to comment Share on other sites More sharing options...
Niha afzal Posted March 27, 2016 Author Share Posted March 27, 2016 B is wrong bcz longitudinal waves cant be polarised because they travel in only one plane ..... C is wrong bcz the relationship isnt correct the amp squared is directly proportional to the intensity not the energy.... B and c are both wrong... But A AND D are both correct :/ Link to comment Share on other sites More sharing options...
studiot Posted March 27, 2016 Share Posted March 27, 2016 Infra is Latin for below and ultra is Latin for above, when referring to the frequency spectrum. Is the wavelength of red longer (greater) than or shorter (less than) blue-violet? So is the frequency of red less than or greater than blue-violet? Link to comment Share on other sites More sharing options...
Niha afzal Posted March 27, 2016 Author Share Posted March 27, 2016 Wwavelength of red is longer than blue .. I seee where I was making mistake. ... the freq of u.v is greater than infra.... which crosses D and the ans much be A Link to comment Share on other sites More sharing options...
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