00418nam a2200169Ia 4500003000400000005001700004008004100021020001800062040000700080041000800087082001700095100002200112245004900134260004000183300001700223365000800240OSt20230505114650.0210423s2012 xx 000 0 und d a9788173710097 cAL aeng a530 VENG223 aVENKATARAMAN (G). aVignettes in physics: at the speed of light. aNew DelhibUniversities Pressc2012 avii, 136bPB cINR