What is the output of the following L = [None]*10 print (len (L))​

What is the structure of L-glucose ?

What type of lens from the following would you have in your magnifying lens to read a page in small print?

In the following circuit find l_1 and l_2 :-

For the l:(x-1)/3=(y+1)/2=(z-3)/(-1) and the plane P:x-2y-z=0 of the following assertions the ony one which is true is (A) l lies in P (B) l is parallel to P (C) l is perpendiculr to P (D) none of these

What will come in place of the question mark (?) in the following series ? X2L T6L ? O20I N30F N42B 1) Q12K 2) Q10K 3) QI2L 4) QI2I 5) None of these

Three lenses L_1,L_2,L_3 each of focal length 30 cm are placed co-axially as shown in (Fig. 11(b).57). An object is held at 60 cm from the optic centre of lens L_1 . The final real image is formed at the focus of L_3 . Calculate separation between (i) L_1 and L_3 (ii) L_2 and L_3 ? .