SET OF MUST PRACTICE QUESTIONS FOR CBSE PHYSICS CLASS XII (AISSCE PHYSICS 2011)

Hello Dear Students, If you were searching for a set of questions which you cannot afford to leave while preparing for AISSCE 2011 Physics Exam, Here it is. Please practice them carefully. If you have any doubt in answering any of these questions, please feel free to ask at www.askphysics.com The content is being updated … Continue reading SET OF MUST PRACTICE QUESTIONS FOR CBSE PHYSICS CLASS XII (AISSCE PHYSICS 2011)

Communication Systems : Revision Test

One mark questions What is the meant by the term attenuation ? Why ground wave transmission is restricted to 1500 kHz? Define critical frequency in sky wave propagation. What type of modulation is required in TV transmission? Why AM radio reception is affected by electrical disturbances while FM radio reception is not? What should be … Continue reading Communication Systems : Revision Test

When several transparent materials are kept above each other, the resultant behaves like an opaque object.Why?What’s the Optics behind it?

When light falls on a object, three things happen - A part of the light is absorbed Another part is reflected ad The remaining part is transmitted. A transparent medium transmits most of the light incident on it. However, it absorbs a small part as well as reflect a small part. Therefore, when a number … Continue reading When several transparent materials are kept above each other, the resultant behaves like an opaque object.Why?What’s the Optics behind it?