Researchers now see what was once invisible. As they do, they are grasping the significance of what they believe are the four fundamental forces — gravity, electromagnetic force, and two subnuclear forces designated the “weak force ” and the“ strong force. ”
मगर ‘ क्लाउड चेंबर, बबल चेंबर, और सिंटिलेशन काउँटर ’ जैसी आधुनिक मशीनों से इनका पता लगाया गया है ।