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 ? .
The bar chart represents number of fiction and non -fiction books in four libraries L1,L2,L3 and L4 .Consider the bar chart and answer questions based on it . The ratio of total books of libraries L1 and L3 to L2 and L4 is A. 29/36 B. 36/29 C. 36/31 D. 32/33
Three energy levels L_1,L_2 and L_3 of a hydrogen atom correspond to increasing values of energy i.e., E_(L_1) lt E_(L_2) lt E_(L_3) . If the wavelength corresponding to the transitions L_3 to L_2, L_2 to L_1 and L_3 to L_1 are lambda_3, lambda_2 and lambda_1 respectively then
Five balls L1, L2, L3, L4 and L5 are kept one above the other (not necessarily in the same order). L1 is just above L5 and just below L4. L2 is just above L3 and just below L5. How many balls are above L2? पांच गेंदों L1, L2, L3, L4 और L5 को एक के ऊपर एक रखा जाता है (जरूरी नहीं कि उसी क्रम में)। L1, L5 के ठीक ऊपर और L4 के ठीक नीचे है। L2, L3 के ठीक ऊपर और L5 के ठीक नीचे है। L2 के ऊपर कितनी गेंदें हैं?
