What does the quark combination uud and udd represent ? Explain How.
What is the difference between positron and proton? Are they same ?
Does the focal length of lenses change if it is immersed into water ? Explain in brief.
What type of medium support longitudinal and transverse wave? Explain.
No physicist has ever “seen” an electron. Yet, all physicists believe in the existence of electrons. An intelligent but superstitious man advances this analogy to argue that ‘ghosts’ exist even though no one has ‘seen’ one. Express your views to this statement.
Do sound wave undergo reflection, refraction and polarization phenomenon ?
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