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  • Strike while the iron is hot !
    AskPhysics Blog Feed Dear students, CBSE has given you more time for exams. We have approximately 7 days before the Physics exams. How to use this seven days effectively for a thorough revision is very important. 7-8 days of sleeping is a must. One hour of exercise 1 to 2 hours for break fast lunch […]
  • Dreams come true only for those who do their part
    AskPhysics Blog Feed I was recently narrating the life story of a girl from Dindigul who got married to a police constable at the age of 14. She was not even reached class 10. She became the mother of two kids by the age of 18. During that time she had to accompany her husband […]
  • “DID THOSE PHILOSOPHERS WORK IN VAIN”
    AskPhysics Blog Feed “The Philosophers who worked in search of the Philosophers’ stone and those set themselves dedicated to find the elixir of life”The works of those in search of the Philosopher’s stone didn’t go in vain, They made the beginning. The beginning itself was so wonderful that anyone who got touched by the idea […]
  • Quarks, conservation, entanglement
    AskPhysics Blog Feed Doubt from AskPhysics.comI have heard the following statements-> 1. Quarks always exist in a group of 2 or 3, and can not stand alone. 2. Protons are made up of 2 up quarks, and 1 down quark. 3. Quantum mechanics allows us to entangle a particle by somehow dividing it into 2(For […]
  • Prepare for Physics oral test too during lockdown
    AskPhysics Blog Feed Plus Two Physics Oral Test series Many schools have started oral questioning also as part of diagnostic and formative assessment. The initiative was … Prepare for Physics oral test too during lockdown The post Prepare for Physics oral test too during lockdown appeared first on Ask Physics.
  • Theory of Relativity
    AskPhysics Blog Feed The basic concepts of relativity are explained in a very simplified way that are easy to understood by Mr. Vivek Sawhney in this YouTube Video… The video focuses upon the general discussion on Theory of Relativity….What is the theory of Relativity? What is time dilation and length contraction? SUBSCRIBE to the YouTube […]
  • A numerical problem from motion in 1 Dimension
    AskPhysics Blog Feed A boy plays with a ball on a field surrounded by a fence which has a height of 2.5m . He kicks the ball vertically up from a height of 0.4m with a speed of 14 ms−1. (a) What is the maximum height of the ball above the fence? (b) What is […]

There Is Something Very Wrong With Particle Physics – CERN

Latest CERN Results Indicate There Is Something Very Wrong With Particle Physics

The Standard Model puts all the known subatomic particles into a single theory. There are six quarks (up, down, charm, strange, top, bottom), six leptons (electrons, muons, tau, and their corresponding neutrinos), the force carrier particles (gluons, photons, Z and W bosons) and the Higgs boson.

The latest results from CERN indicate that we might be on the verge of new physics.

The predictions based on standard model for a special particle called a B meson doesn’t match what has been seen in the experiment.

CERN has now started a new round of high-energy collisions that will hopefully provide an insightful look into the potential brave new world beyond the Standard Model.

Refer home.cern for more

A particle that doesn’t fit the laws of physics – CERN

Researchers could be very close to finding a FIFTH  fundamental force. Results from the Large Hadron Collider hint at a particle that doesn’t fit the laws of physics. The new particle is believed to be SIX times heavier than the Higgs boson particle.

Further testing is required which is why more ‘collisions’ will commence next month in order to obtain new data. Scientists believe they will have either the ultimate confirmation or refutation of its existence by summer of 2016.

Professor John Ellis, theoretical physicist at Kings College London told the Mail Online in an interview: ‘it would be something completely beyond the Standard Model, and the tip of an iceberg of a large new set of particles if it exists.’

Two of the detectors, ATLAS and CMS, were used to look for new physics and did so by counting ‘particle decays’ that ended up in TWO photons

Researchers believe that this is a good way to push the limits of physics beyond the known because photons are easy to detect and scientists know exactly what to expect in terms of results of background events.

‘It weighs about 750 GeV, corresponding to about six times heavier than the Higgs boson, and almost 800 times heavier than the proton,’ said Professor Ellis.

Download Previous Question Papers for CBSE Syllabus

Previous Year Question Papers for Class X/XII (Board Examination 2013 – Comptt)

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Q.P. CLASS XII

Previous Year Question Papers & Marking Scheme for Class X/XII (Board Examination 2013)

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CBSE Physics Question Paper Class XII – 2014 Delhi Set 1 and Marking Scheme

Set 1 Physics Delhi 2014 Marking Scheme

2013 outside Delhi Physics question paper can be downloaded here

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Problem with Einstein’s Theory of Relativity

Einstein’s theory of relativity was beyond any doubt lovely, different from any other theory ever imagined by mankind. Newton described gravity merely as a force acting over a distance attracting any 2 masses, the force proportional to the product of the two masses and inversely proportional to the square of the distance between them. This simple straight forward theory worked well for over two hundred years.

The theory is deceptively simple. First, there is no “absolute” frame of reference. Every time you measure an object’s velocity, or its momentum, or how it experiences time, it’s always in relation to something else. Second, the speed of light is the same no matter who measures it or how fast the person measuring it is going. Third, nothing can go faster than light.

The Problem
The mass that determined the strength of the gravitational force was the same mass that appeared in Newton’s second law of motion, F = ma; gravitational mass was the same as the “inertial mass.” There was no apparent reason this had to be true, it simply was.

Einstein didn’t think this was mere coincidence. He insisted that the two types of mass are identical because of a fundamental symmetry in nature; that the laws of physics must take the same form whether one is in a gravitational field or in a region of space with no gravity (say, in a spaceship undergoing an equivalent acceleration). Carrying this principle to its logical conclusions eventually led to the equations of general relativity, the theory considered by many to be “probably the most beautiful of all existing physical theories.”

General relativity, also known as the general theory of relativity, is the geometric theory of gravitation published by Albert Einstein in 1915. General relativity generalizes special relativity and Newton’s law of universal gravitation, providing a unified description of gravity as a geometric property of space and time, or spacetime. In particular, the curvature of spacetime is directly related to the energy and momentum of whatever matter and radiation are present.

relativity

Some predictions of general relativity differ significantly from those of classical physics, especially concerning the passage of time, the geometry of space, the motion of bodies in free fall, and the propagation of light. The predictions of general relativity have been confirmed in all observations and experiments to date. Although general relativity is not the only relativistic theory of gravity, it is the simplest theory that is consistent with experimental data.

The Unanswered Questions

How general relativity can be reconciled with the laws of quantum physics to produce a complete and self-consistent theory of quantum gravity?

The problem of quantum gravity and the question of the reality of spacetime singularities remain open. Observational data that is taken as evidence for dark energy and dark matter could indicate the need for new physics. Even taken as is, general relativity is rich with possibilities for further exploration. Mathematical relativists seek to understand the nature of singularities and the fundamental properties of Einstein’s equations,and increasingly powerful computer simulations (such as those describing merging black holes) are run.

So, in a nutshell, Einstein’s Theory of Relativity is not complete. More needs to be added, more explanations to be given and more observations to be endorsed.

 

Ref: http://www.gallup.unm.edu/~smarandache/UnsolvedProblemsRelativity.pdf

Medical Entrance help materials for Quick Revision

Hello Dear aspirants of the Medical  Profession who are going to write the All India Medical Entrance!

You were studying hard all these days. Now try these last-minute tips and tricks before you head towards the exam.

The All India Pre-Medical/Pre-Dental Entrance Test (AIPMT) 2014, is your gateway to MBBS or BDS degree. The AIPMT 2014 scores will be used for admission to 15% of undergraduate Medical and Dental course seats in Government Medical/Dental Colleges of India in addition to participating State Government’s Universities/Institutes.

AIPMT 2014 test consists of 180 objective-type multiple choice questions from Physics, Chemistry and Biology (Botany and Zoology) to be answered in 3 hours. The syllabus is based on topics both from Class 11 and Class 12.

Some Last Minute Tips (for Physics)

  • Revise concepts from NCERT books
  • Revise all formulas and the context (the relevant concepts)
  • Read and understand the concept before trying to answer questions.
  • Improve your speed in answering papers by trying to complete them within the time frame you will have available at the examination. 
  •  Be meticulous in answering questions, correct S.I. Units and other details are very important and you may lose marks on an otherwise correct question if you miss the minor details.  
  • Practice all additional exercises too from NCERT

Find Below a list of all IMPORTANT FORMULAE in Physics for AIPMT 2014

Important Physics Formulae

All the Best

 

 

 

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