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Flint glass is optical glass that has relatively high refractive index and low Abbe number (high dispersion). A concave lens of flint glass is commonly combined with a convex lens of crown glass to produce an achromatic doublet lens because of their compensating optical properties, which reduces chromatic aberration (colour defects).
Choose the next number in the series.
25, 41, 73, 89, 121,?
Pointing to a child in the photograph, a gentleman said “His father’s father is my brother.” How is this gentleman related to the child?
A square sheet of paper is folded along the dotted lines successively in the directions shown and is then punched in the last. How would the paper look ...
If E is 22 and MEN is 49. Then what is HEN?
If A denotes ‘+’, B denotes ‘×’, C denotes ‘−’, and D denotes ‘÷’, then what will come in place of ‘?’ in the following equation...
MEOP is related to KCMN in a certain way based on the English alphabetical order. In the same way, LTDG is related to JRBE To which of the following is ...
In the following question, select the missing number from the given series.
64, 72, 45, 109, –16, ?
Select the option that is related to the third word in the same way as the second word is related to the first word. (The words must be considered as me...
Mary is taller than Aayushi. Gunjan is taller than Aayushi but shorter than Shalini, who is taller than Mary. Who among them is the tallest?
Select the triad in which the numbers are related in the same way as are the numbers of the following triads. (NOTE: Operations should be performed on t...
