Share & grow the world's knowledge!
We want to connect the people who have knowledge to the people who need it, to bring together people with different perspectives so they can understand each other better, and to empower everyone to share their knowledge.
Mention some important contributions of Albert Einstein to physics.
(i). Mass-energy equivalence (ii). Photoelectric effect and (iii). Theory of relativity For more please visit here: https://www.tiwariacademy.com/ncert-solutions/class-11/physics/chapter-1/
(i). Mass-energy equivalence
(ii). Photoelectric effect and
(iii). Theory of relativity
For more please visit here:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-11/physics/chapter-1/
Who first gave theory of expanding universe?
Edwin Hubble of U.S.A. For more please visit here: https://www.tiwariacademy.com/ncert-solutions/class-11/physics/chapter-1/
Edwin Hubble of U.S.A.
For more please visit here:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-11/physics/chapter-1/
What is physics? What is the origin of the word physics? What is its Sanskrit equivalent?
Physics is the branch of science that deals with the study of matter, energy, and the fundamental forces of nature, as well as the interactions between them. It aims to understand the behavior of the universe at both macroscopic and microscopic scales, from the motion of celestial bodies to the propRead more
Physics is the branch of science that deals with the study of matter, energy, and the fundamental forces of nature, as well as the interactions between them. It aims to understand the behavior of the universe at both macroscopic and microscopic scales, from the motion of celestial bodies to the properties of subatomic particles. Physics seeks to uncover the laws that govern natural phenomena and applies these principles to explain, predict, and sometimes control various processes in the world around us.
The word physics is derived from the Greek word “physis,” meaning “nature” or “natural things.” The term reflects the field’s focus on understanding the natural world and the fundamental principles that govern its functioning.
In Sanskrit, the equivalent of “physics” is generally referred to as “भूतविज्ञान” (Bhūta-Vijñāna), which translates to “the science of elements” or “the science of nature.” Another term, “द्रव्यगुण” (Dravya-Guna), is used to describe the study of the properties of matter. These terms reflect the ancient Indian understanding of natural phenomena and the exploration of matter and its properties in a scientific context.
For more please visit here:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-11/physics/chapter-1/
What is gravitational force? Mention its important properties. Give some examples of gravitational force.
The gravitational force is one of the four fundamental forces of nature, responsible for the attraction between objects with mass. It acts over an infinite range and is always attractive, playing a key role in the structure and dynamics of the universe. According to Newton's law of gravitation, theRead more
The gravitational force is one of the four fundamental forces of nature, responsible for the attraction between objects with mass. It acts over an infinite range and is always attractive, playing a key role in the structure and dynamics of the universe. According to Newton’s law of gravitation, the force between two masses is proportional to the product of their masses and inversely proportional to the square of the distance between them. Albert Einstein’s general theory of relativity further refined this understanding, describing gravity as the curvature of spacetime caused by mass and energy.
Important Properties of the Gravitational Force:
1. It is the weakest of the four fundamental forces but dominates at large scales due to its cumulative nature and infinite range.
2. It is always attractive and acts along the line joining the centers of two masses.
3. The force depends on the masses of the objects and the distance between them, as described by
𝐹 = G m1m2.r^2 , where G is the gravitational constant.
4. Gravitational force is independent of the medium through which it acts and affects all objects with mass equally.
Examples of Gravitational Force:
1. The force that keeps planets in orbit around the Sun and governs the motion of celestial bodies.
2. The attraction between Earth and objects near its surface, which we experience as weight.
3. The phenomenon of tides, caused by the gravitational pull of the Moon and the Sun on Earth’s oceans.
4. The binding of galaxies and galaxy clusters through gravitational attraction.
5. The collapse of massive stars into black holes, where gravity becomes extremely strong, warping spacetime significantly.
For more please visit here:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-11/physics/chapter-1/
How is the study of physics useful to the study of other sciences?
The study of physics is foundational to many other sciences because it provides fundamental principles, tools, and methodologies that underpin our understanding of natural phenomena. Physics explains the basic laws of matter, energy, space, and time, which are essential for studying the complex systRead more
The study of physics is foundational to many other sciences because it provides fundamental principles, tools, and methodologies that underpin our understanding of natural phenomena. Physics explains the basic laws of matter, energy, space, and time, which are essential for studying the complex systems found in other scientific disciplines.
In chemistry, physics is crucial for understanding atomic structure, bonding, thermodynamics, and reaction kinetics. Quantum mechanics, a branch of physics, explains the behavior of electrons and the periodic table’s structure. In biology, biophysics applies physical principles to biological systems, such as the mechanics of muscle movement, the flow of blood, and the behavior of biomolecules like DNA. Physics also aids in imaging technologies like MRI and CT scans.
In geology, principles from physics are used to study seismic waves, rock mechanics, and the Earth’s magnetic and gravitational fields. In astronomy, physics explains the motion of celestial bodies, the nature of stars, and cosmological phenomena like black holes and the expansion of the universe. Even in emerging fields like environmental science, physics helps in understanding climate dynamics, energy transfer, and sustainable energy technologies.
Moreover, physics provides experimental techniques, computational methods, and tools like lasers, spectroscopy, and particle accelerators, which are widely used in other sciences. It fosters quantitative reasoning and problem-solving skills, enabling interdisciplinary advances and a deeper understanding of the natural world.
For more please visit here:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-11/physics/chapter-1/