00541nam a22001817a 4500 116588 116587 OSt 20260706112932.0 201020b ||||| |||| 00| 0 eng d 9788121904698 53 HAR Harnam Singh 225 B.Sc practical physics: For B.Sc students of all Indian universities by Harnam Singh Newdeldhi S.Chand 2009 1045p. Properties of matter Waves and acoustics Geometric optics Hemne,P S 226 ddc BK