Pooja academy

                 POOJA ACADEMY   Ques 1  : What eye defect is hypermetropia?? Describe with ray diagram how this defect of vision can be correct(क्या आंख दोष हाइपर्मेट्रोपिया है ?? रे आरेख के साथ वर्णन करें कि दृष्टि का यह दोष सही कैसे हो सकता है) .                                     3 marks Ques 2 : what is meant by dispersion of light white light and explain why star twinkle but planet don't(प्रकाश सफेद रोशनी के फैलाव से क्या मतलब है और समझाओ कि सितारा चमक क्यों है लेकिन ग्रह नहीं है) .                                                     3 marks Ques 3 : what is atmospheric refraction? Explain advanced sunrise and delayed sunset(वायुमंडलीय अपवर्तन क्या है? उन्नत सूर्योदय और देरी सूर्यास्त समझाओ).                      3 marks Ques 4 : Write function of each of following parts of human eye : cornea,iris,crystalline lens,ciliary muscles,retina(मानव आंख के निम्नलिखित भागों में से प्रत्येक का कार्य लिखें: कॉर्निया, आईरिस, क्रिस्टलीय लेंस, सिलीरी मांसपेशियां,रेटिना

                                    Human eye : Eye is the most important organ of human body because of the eye we are able to see the world but have you ever wonder how human eye works or how are we able to see the world or how human eye works????? if you want answers for these question you are at the right place let me give you the answer first look at the diagram of the eye ----                                     C ornea ; It is the outer part of human eye from which light starts refracting and enters into the eye Anterior chamber ; it is the aqueous humor filled between cornea and iris. it protects eye from minor damages Iris ; iris is responsible for controlling the size of pupil and it has muscles that contract or expands depending on amount of light pupil needs to process the image. iris is responsible for color of the eye Pupil ; pupil is the black part in center of the eye. pupil controls the amount of light should enter into eye to make sharp and clear imag

(Hello students, here I am going to give you top 5 question of chapter light do these questions by your own Chapter: light - reflection and refraction Ques 1 . An object is kept in front of concave mirror of focal length 15cm. The image formed is three times the size of object. Calculate two possible distances of object from the mirror. (फोकल लम्बाई 15 सेंटीमीटर के अवतल दर्पण के सामने एक वस्तु रखी जाती है। बनाई गई छवि ऑब्जेक्ट के आकार के तीन गुना है। दर्पण से ऑब्जेक्ट की दो संभावित दूरी की गणना करें).        3marks Ques 2. What is power of lens?? If power is +2.5D. What kind of lens is it and what is it's focal length.(लेंस की क्षमता क्या है ?? अगर क्षमता + 2.5 डी है। यह किस प्रकार का लेंस है और इसकी फोकल लम्बाई क्या है।).       2marks Ques 3 . Draw ray diagram of concave mirror when object is placed between c and f . Write nature of image(सी और एफ के बीच ऑब्जेक्ट रखा जाता है तब अवतल दर्पण के रे आरेख ड्रा। छवि की प्रकृति लिखें).                 3marks Ques 4. Writ

Hey guys!! This is Ram sir from Pooja academy and I want to spread love for physics in the world. For this I want to share some information about physics......... Physics is to study everything around us, about universe, planet, star, sky, force, matter, element, non element, gas, liquid, atom, etc.... Through the past so many years with the help of physics we discover so many things, and yet we are doing same.                      

A.P(Arithmetic Progression) is the sequence of numbers where there is a common difference between two consecutive numbers. Suppose if there is a sequence 3,6,9,12,15,18,21,24....................... this sequence said to be arithmetic progression because there is constant common difference(i.e 3) between two consecutive numbers * Questions which are important as cbse point of view for class 11 A.P Ques 1. Find sum of 1+(1+4)+(1+4+9)+(1+4+9+16)............ 4marks Ques 2. Show that sum of  m+n th  term and  m-n th  term of A.P is equal to twice of  m th  term.        4marks Ques 3. The ratio of A.M and G.M of two positive number a & b is m:n then show that a:b = m+ (m 2 +n 2 ) 1/2  : m - (m 2 +n 2 ) 1/2     6 marks Ques 4. The ratio of (n)th term of two A.P's 3n+1:4n+3 find ratio of their  m th  term.                  4marks Ques 5. If the sum of n terms of A.P is  3n 2 +5n  & it's  m th  term is 164 find m.                         6marks