Category: Optics

Question Number 176966 by mr W last updated on 28/Sep/22 Commented by mr W last updated on 29/Sep/22 $${is}\:{it}\:{possible}\:{that}\:{a}\:{light}\:{ray}\:{starting} \\ $$$${from}\:{point}\:{O}\:{returns}\:{back}\:{to}\:{the}\:{same} \\ $$$${point}\:{after}\:{being}\:{reflected}\:{at}\:{the} \\ $$$${points}\:{P},\:{Q},\:{R}\:{on}\:{the}\:{three}\:{mirror}…

Question Number 44676 by ajfour last updated on 03/Oct/18 Commented by ajfour last updated on 03/Oct/18 $${If}\:\:\boldsymbol{\mu}\left({x}\right)=\:\frac{\mu_{\mathrm{0}} {L}}{{L}+\left(\mu_{\mathrm{0}} −\mathrm{1}\right){x}} \\ $$$${Find}\:{equation}\:{of}\:{path}\:{of}\:{light} \\ $$$${as}\:{it}\:{travels}\:{in}\:{the}\:{medium}\:{with} \\ $$$${refractive}\:{index}\:\mu\left({x}\right).…

Question Number 43571 by rahul 19 last updated on 12/Sep/18 Answered by ajfour last updated on 21/Sep/18 $$\bar {{v}}_{{I}} =\:\left(\bar {{v}}_{{O}} −\bar {{v}}_{{M}} \right)−\mathrm{2}\left(\bar {{v}}_{{O}}…

Question Number 42475 by Necxx last updated on 26/Aug/18 $${A}\:{signpost}\:\mathrm{4}.\mathrm{5}{cm}\:{high}\:{is}\:\mathrm{30}{cm}\:{away}\circledast \\ $$$${from}\:{Mrs}\:{Rahup}.{What}\:{is}\:{the} \\ $$$${height}\:{of}\:{the}\:{image}\:{formed}\:{in}\:{her} \\ $$$${retina}?\left({Take}\:{the}\:{eye}\:{lens}-{retina}\right. \\ $$$$\left.{distance}\:{as}\:\mathrm{1}.\mathrm{5}{cm}\right). \\ $$ Commented by Necxx last updated…

Question Number 41906 by Necxx last updated on 15/Aug/18 $${A}\:{concave}\:{lens}\:{of}\:{focal}\:{length}\:\mathrm{60}{cm} \\ $$$${is}\:{made}\:{of}\:{material}\:{whose} \\ $$$${refractive}\:{index}\:{for}\:{red}\:{light}\:{is} \\ $$$$\mathrm{1}.\mathrm{641}\:{and}\:{refractive}\:{index}\:{for}\:{blue} \\ $$$${light}\:{is}\:\mathrm{1}.\mathrm{659}.{That}\:{for}\:{white}\:{light} \\ $$$${is}\:\mathrm{1}.\mathrm{65}.{It}\:{is}\:{combined}\:{with}\:{a}\:{convex} \\ $$$${lens}\:{of}\:{dispersive}\:{power}\:\mathrm{0}.\mathrm{0173}\:{to} \\ $$$${form}\:{an}\:{achromatic}\:{doublet}. \\…