There are two laws of refraction of light. these are : a) Incident say , refracted ray and normal lie on same plane . The concept of plane is shown in the image. In terms of x,y and z co-ordinate system , the y-z plane is shown in light sky blue colour. We write on … Read more
There are many effects of the refraction of life in our day to day life. For example I am citing few of them.a) The partly immersed stick appear to be bend at the surface of the water. b) The coin kept in water appears raised upward.c)The water of a pool appear less depth.d)Stars appear to … Read more
Case1: When ray of light travels from rarer medium like air to a denser medium like glass then it bends towards normal. Case 2: When ray of light travels from denser medium like glass to a rarer medium like air then it bends away from the normal. Case 3: When ray of light travels from … Read more
लक्ष्य की उंचाई सफलता को गति और उर्जा प्रदान करती है। परन्तु ऐसा लक्ष्य जो किसी बच्चे की क्षमता से अत्यधिक है । वह बच्चे को मानसिक रोगी या पागल बनाता है । और कभी कभी बच्चे आत्महत्या का शिकार हो जाते हैं। इसलिए मेरा मानना है कि इस तरह का दबाव अनुचित है। जब … Read more
Cause of Refraction : The speed of the light in different transparent substances is different. For example speed of light in air is 3×10⁸ m/s and that of in glass is 2×10⁸ m/s. It is clear that the two speeds of the light are different. When light enters from air to glass the speed of … Read more
Refract means bending. The bending of ray of light when it pass from one medium to another medium is known by a term called refraction. Refraction of Light happens due to different speed of light in different medium. Speed of light in air is 3×10⁸m/s and that of in glass is 2×10⁸m/s. Refraction of Light: … Read more
Important mathematical relations of measurement. These are very important mathematical relations. It must be on the tongue of a student . These common relations are seen very frequently in the sum . | Mass 1 Ton = 10 Quintals 1 Quintal = 100 Kg 1 Kg = 1000 g 1 pound = 453 g Distance … Read more
Important Squares and their square root. THE STUDENT MUST MEMORISE THIS BY TONGUE. 42 = 16 112 = 121 52 = 25 √(25)=5 62 = 36 √(36)= 6 72 = 49 √(49 ) = 7 82 = 64 √(64)= 8 92 = 81 √(81)= 9 102 = 100 √(100) = 10 112 = 121 √(121) … Read more
This chapter is about a letter written by a young lady; whose father was victim of this terror attack. Q(01) Where was the writer’s father when the terrorist attack took place? Who was with him? Ans: The writer’s father was at the Indian restaurant on the first floor of the Oberoi hotel when the terrorist … Read more
Explore “Lochinvar” which is include in the syllabi of English Literature ICSE Class 8. Q(01) Where was the Lochinvar going ? Why was he in such a hurry? Ans: Lochinvar was going to the Netherby hall in the marriage ceremony of fair Ellen. Lochinvar loves Ellen but Ellen’s father has forced Ellen to marry somebody … Read more