shahkar jalal
Bio
Stories (171)
Filter by community
How Does Light Bend Near Massive Objects?
The Classical View of Light and Gravity Before Einstein, classical physics treated gravity as a force acting between masses. Since light has no rest mass, it was assumed that photons would not be affected by gravity. In this view, light always travels in straight lines, and any apparent deflection would have to come from interactions with matter, not gravity itself.
By shahkar jalal9 days ago in Education
Can Light Be Slowed Down or Stopped?
How Fast Does Light Normally Travel? In a perfect vacuum, light travels at a constant speed known as c, approximately 299,792 kilometers per second. This speed is a fundamental constant of nature and represents the maximum speed at which information can travel.
By shahkar jalal9 days ago in Education
Is Light a Wave or a Particle?
What Is Light? Light is a form of electromagnetic radiation. It carries energy, travels through empty space, and allows us to see the universe. From radio waves to gamma rays, light spans a vast spectrum, but visible light is only a small part of it.
By shahkar jalal9 days ago in Education
Is There a Fifth Fundamental Force?
The Four Known Fundamental Forces Modern physics describes nature using four fundamental forces: 1. Gravity Gravity is the weakest but most familiar force. It governs the motion of planets, stars, and galaxies, shaping the large-scale structure of the universe. Despite its importance, gravity remains the least understood at the quantum level.
By shahkar jalal9 days ago in Education
Why Do Fundamental Constants Have Their Values?
What Are Fundamental Constants? Fundamental constants are fixed numerical values that define how the universe behaves. They are not measured in the usual sense like length or mass, but instead act as conversion factors between physical quantities or as pure numbers that shape reality.
By shahkar jalal9 days ago in Education
Is Gravity a Force or an Illusion?
Gravity in Everyday Experience In daily life, gravity feels unquestionably real. When you drop an object, it accelerates downward. When you jump, gravity pulls you back to Earth. These experiences suggest a force acting continuously on matter.
By shahkar jalal10 days ago in Education
