Arrange the following steps in a sequential order to verify the laws of reflection. (A) A hard , smooth surface (AB) is mounted vertically overa horizontal board on which two tubes P and Q , point towards the surface AB. (B) The tube Q is adjusted such that the listener would be able to hear the ticking sound clearly at the end away from AB. (C) The sound waves from a source , like ticking clock are directed to the surface AB through the pipe P inclined at an angle to AB . (D) By measuring the angles the tubes make with the surface AB , the laws of reflection are verified .

Arrange the following steps in a sequential order to verify the laws o

1.	Arrange the following steps in a sequential order to verify the laws of reflection. (A) A hard , smooth surface (AB) is mounted vertically overa horizontal board on which two tubes P and Q , point towards the surface AB. (B) The tube Q is adjusted such that the listener would be able to hear the ticking sound clearly at the end away from AB. (C) The sound waves from a source , like ticking clock are directed to the surface AB through the pipe P inclined at an angle to AB . (D) By measuring the angles the tubes make with the surface AB , the laws of reflection are verified .
Answer» <P>ABCD ACBD DCBA CDAB SOLUTION :A hard , smooth surface (AB) is mounted vertically over a horizontal board on which two tubes P and Q , point towards the surface AB (a) . The SOUND waves from a source , LIKE ticking CLOCK are directed to the surface AB through the pipe P inclined at an angle to AB (c) . The tube Q is adjusted such that the listener would be able to hear the ticking sound clearly at the end away from AB (b) . By measuring the angles the tubes P and Q make with the surface AB , the laws of reflection are verified (d) .

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