PhysicsPhysical ConstantNCTB পদার্থবিজ্ঞান অধ্যায় ১৩ (আধুনিক পদার্থবিজ্ঞান) / কোয়ান্টাম তত্ত্ব
Planck Constant
Bengali: প্লাঙ্কের ধ্রুবক•Pronunciation: প্ল্যাঙ্ক কনস্ট্যান্ট•Symbol: h
Standard Definition:
A fundamental physical constant relating the energy of a photon to its electromagnetic frequency.
📐 Mathematical Equation, Units & Dimensions
Defining Mathematical Equation
Standard SI Unit
J*s (Joule-second)($J\cdot s$ (জুল-সেকেন্ড))
Dimensional Analysis
CGS Unit
erg*s
📖 Physical Concept & Comprehensive Explanation
Introduced by Max Planck, this fundamental constant links photon energy to wave frequency through E = h*nu. Its SI value is fixed exactly at 6.62607015 * 10^-34 J*s.
🎯 High-Yield Revision Points
- ✓Value: h = 6.626 * 10^-34 J*s.
- ✓Governs photon energy via E = h*f.
- ✓Shares the exact same dimension as angular momentum ([M L^2 T^-1]).
Use Online Solver for Planck Constant
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❓ Frequently Asked Exam Questions (FAQ)
Common questions in board and competitive entrance examinations
Q1: Does Planck's constant share dimensions with angular momentum?
Yes, both possess the identical dimensional formula [M L^2 T^-1].