CBSE 12th Std Physics Numerical from Optics

A convex lens of crown glass(1.5) has a focal length of 15 cm. The lens is placed in (a) water(1.33) and carbon bisulphide(1,65).determine in each case whether the lens behaves as a conveging or a diverging lens and determine its focal length. (Asked by Shobha) Answer: Formula used For the lens to be converging, f … Continue reading CBSE 12th Std Physics Numerical from Optics

What is refractive index?

Refractive index of a substance is a measure of the relative speed of light through that substance. It tells us by what fraction light is slowed down in the medium. Refractive index = speed of light in vacuum /speed of light in the medium Snell’s law...

MODEL QUESTION PAPER FOR AISSCE 2008

PHYSICS TIME 3 HRS                                    MAX MARKS: 70 GENERAL INSTRUCTIONS: All questions are compulsory. There are 30 questions in total. Questions 1 to 8 carry one mark each, questions 9 to 18 carry 2 marks each, questions 19 to 27 carry 3 marks each and questions 28 to 30 carry 5 marks each. There is no … Continue reading MODEL QUESTION PAPER FOR AISSCE 2008