Relation Pahchano 4 | Riddles and Puzzles for IQ Test | Paheli | Hindi Paheliyan #Shorts

Paheliyan and Detective Riddles To Test Your Brain| Hindi Paheliyan | Mind Your Logic

The limit of resolution of a microscope is the least distance between two point objects which can be seen clearly and distinctively with it. For a naked eye, limit of resolution is about 10^(-4) m or 0.1 mm. The limit of resolution for a microscope is of the order of lambda/2 , where lambda is wavelength of light used. For an optical microscope , using visible light, limit of resolution is "500 nm"/2 =250 mm. This is 400 times smaller than naked eye. So the useful magnification produced by it is 400. Smaller is the limit of resolution, greater is the magnification that can be achieved. By using shorter wavelengths , we can improve resolution. For examination of a microorganism, much higher limit of resolution is needed, the Wave nature of electron provides a means for probes of very small size organisms. An electron beam accelerated by a high potential difference possess a very short wavelength. In an electron microscope magnetic lenses are used to control the path of electrons. The image of object is obtained on a fluorescent screen or on a photographic plate. The electron microscope with its high magnifying power and resolving power , is one of the most indispensable and powerful tool for research in science , medicine and industry. The working of an electron microscope uses properties of electrons related to

In this section each item consists of six sentences of a passage. The first and sixth sentences are given in the beginning as S1 and S6. The middle four sentences in each have been jumbled up and labelled P, Q, R and S. You are required to find the proper sequence of the four sentences S1 :Some students may feel that fast readers do not understand as much as slow readers. S6 :This statement, however, needs to be made with caution P :Some slow readers will have good comprehension and others poor. Q :A quick glance at the scores will show that fast readers sometimes have very good comprehension and sometimes poor. R : This fi,tllacy can easily be disproved when you give the first reading test in a class. S : In short, there is little relation between reading speed and comprehension. The proper sequence should be

After that gruesome challenge, Professor McGonagall decides to test Harry with one of her favourite puzzles. In a party, Minerva and her friends decide to play a party game with cards. There are 20 cards arranged in a row on the table. Each card is showing a positive integer. On each player's turn, he is allowed to take either the left most or right most card. This is done until all the cards are taken. The winner is the player who has the greatest sum of num- bers on his/her cards. What should be Minerva’s first move so that she can win the game? The sequences are: A rarr 2 11 13 8 12 5 6 8 9 21 10 7 15 17 18 4 16 18 19 1 B rarr12 18 13 4 8 16 17 5 3 19 21 1 6 11 12 18 14 15 6 9

Test whether the following relations R_1,R_2"and"R_3,"" are (i) reflexive (ii) symmetric and (iii) transitive: R_1 on Q_0 defined by (a , b)R_1 a=1/b R_2 on Z defined by (a , b)R_2|a-b|lt=5 R_3 on R defined by (a , b)R_3 a^2-4a b+3b^2=0