यदि mu_2=._au_g=(3)/(2),mu_3=._au_(omega)=(4)/(3), लेंस की नक्काशी की त्रिज्या का परिमाण 1 है...

if mu_2=._au_g=(3)/(2),mu_3=._au_(omega)=(4)/(3) , magnitude of radii of carvature of lens are 10 cm and 20 cm find focal length of lens if rays are incident from (a) air and (b) water,

In the figure shown mu_(1),mu_(2),mu_(3),mu_(4) and mu_(5) are the refractive indices of the mediums 1,2,3,4 and 5 respectively. Consider the following: (1) mu_(1)=mu_(2) (2) mu_(3)=mu_(4)=mu_(5) (3) mu_(2) lt mu_(3) (4) mu_(4)gt mu_(5) Which of the above are correct?

If the base radius of 2 cylinders are in the ratio 3:4 and their heights are in the ratio of 4:9, then the ratio of their volumes is: यदि दो बेलनों के आधार की त्रिज्या का अनुपात 3 : 4 है तथा उनकी ऊंचाई का अनुपात 4 : 9 है, तो उनके आयतन का अनुपात क्या होगा ?