O/A Level Physics by Engr. Zobayer

🎓𝑶/𝑨 𝑳𝒆𝒗𝒆𝒍 𝙋𝙃𝙔𝙎𝙄𝘾𝙎 𝑨𝒅𝒎𝒊𝒔𝒔𝒊𝒐𝒏 𝑶𝒑𝒆𝒏🎓@ Gulshan & Lalmatia
📢 𝗙𝗼𝗿 𝗢 & 𝗔 𝗹𝗲𝘃𝗲𝗹 𝗦𝗲𝘀𝘀𝗶𝗼𝗻 𝟮𝟬𝟮𝟲,2027
𝗨𝗻𝗹𝗼𝗰𝗸 𝘁𝗵𝗲 𝘀𝗲𝗰𝗿𝗲𝘁𝘀 𝗼𝗳 𝗣𝗵𝘆𝘀𝗶𝗰𝘀 𝘄𝗶𝘁𝗵 𝐄𝐧𝐠𝐫 𝐙𝐨𝐛𝐚𝐲𝐞𝐫 𝐒𝐢𝐫, 𝗮 𝘀𝗲𝗮𝘀𝗼𝗻𝗲𝗱 𝗲𝗱𝘂𝗰𝗮𝘁𝗼𝗿 𝘄𝗶𝘁𝗵 𝘆𝗲𝗮𝗿𝘀 𝗼𝗳 𝘁𝗲𝗮𝗰𝗵𝗶𝗻𝗴 𝗲𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲! 🌟
𝗪𝗵𝗮𝘁 𝘄𝗲 𝗼𝗳𝗳𝗲𝗿:
✅ 𝗘𝘅𝗽𝗲𝗿𝘁 𝗟𝗲𝗰𝘁𝘂𝗿𝗲𝘀: 𝗜𝗻-𝗱𝗲𝗽𝘁𝗵 𝗰𝗼𝘃𝗲𝗿𝗮𝗴𝗲 𝗼𝗳 𝗮𝗹𝗹 𝘁𝗼𝗽𝗶𝗰𝘀
✅ 𝗤𝘂𝗲𝘀𝘁𝗶𝗼𝗻 𝗣𝗮𝗽𝗲𝗿 𝗦𝗼𝗹𝘃𝗶𝗻𝗴 𝗩𝗶𝗱𝗲𝗼𝘀: 𝗕𝗼𝗼𝘀𝘁 𝘆𝗼𝘂𝗿 𝗽𝗿𝗼𝗯𝗹𝗲𝗺-𝘀𝗼𝗹𝘃𝗶𝗻𝗴 𝘀𝗸𝗶𝗹𝗹𝘀 𝘄𝗶𝘁𝗵 𝗼𝘂𝗿 𝗱𝗲𝘁𝗮𝗶𝗹𝗲𝗱 𝘀𝗼𝗹𝘂𝘁𝗶𝗼𝗻𝘀
✅ 𝗙𝘂𝗹𝗹 𝗠𝗼𝗰𝗸 𝗧𝗲𝘀𝘁𝘀: 𝗦𝗶𝗺𝘂𝗹𝗮𝘁𝗲 𝗲𝘅𝗮𝗺 𝗰𝗼𝗻𝗱𝗶𝘁𝗶𝗼𝗻𝘀 𝘁𝗼 𝗺𝗮𝘅𝗶𝗺𝗶𝘇𝗲 𝘆𝗼𝘂𝗿 𝗽𝗲𝗿𝗳𝗼𝗿𝗺𝗮𝗻𝗰𝗲
✅ 𝗜𝗻𝘁𝗲𝗿𝗮𝗰𝘁𝗶𝘃𝗲 𝗦𝗼𝗹𝘃𝗶𝗻𝗴 𝗖𝗹𝗮𝘀𝘀𝗲𝘀: 𝗣𝗲𝗿𝘀𝗼𝗻𝗮𝗹𝗶𝘇𝗲𝗱 𝗮𝘁𝘁𝗲𝗻𝘁𝗶𝗼𝗻 𝘁𝗼 𝗰𝗹𝗲𝗮𝗿 𝗱𝗼𝘂𝗯𝘁𝘀 𝗮𝗻𝗱 𝘀𝘁𝗿𝗲𝗻𝗴𝘁𝗵𝗲𝗻 𝗰𝗼𝗻𝗰𝗲𝗽𝘁𝘀.
🧤
𝗝𝗼𝗶𝗻 𝘂𝘀 𝘁𝗼𝗱𝗮𝘆 𝗮𝗻𝗱 𝘀𝘁𝗮𝗿𝘁 𝘆𝗼𝘂𝗿 𝗷𝗼𝘂𝗿𝗻𝗲𝘆 𝘁𝗼 𝘀𝘂𝗰𝗰𝗲𝘀𝘀 𝘄𝗶𝘁𝗵 𝘁𝗵𝗲 𝗯𝗲𝘀𝘁 𝗶𝗻 𝘁𝗵𝗲 𝗳𝗶𝗲𝗹𝗱!
🎯 𝗪𝗵𝘆 𝗖𝗵𝗼𝗼𝘀𝗲 𝐄𝐧𝐠𝐫 𝐙𝐨𝐛𝐚𝐲𝐞𝐫 𝐒𝐢𝐫's 𝗖𝗼𝗮𝗰𝗵𝗶𝗻𝗴:
𝗣𝗿𝗼𝘃𝗲𝗻 𝘀𝘂𝗰𝗰𝗲𝘀𝘀 𝘄𝗶𝘁𝗵 𝘀𝘁𝘂𝗱𝗲𝗻𝘁𝘀
𝗖𝗹𝗲𝗮𝗿 𝗮𝗻𝗱 𝗰𝗼𝗻𝗰𝗶𝘀𝗲 𝘁𝗲𝗮𝗰𝗵𝗶𝗻𝗴 𝗺𝗲𝘁𝗵𝗼𝗱𝘀
𝗙𝗼𝗰𝘂𝘀𝗲𝗱 𝗼𝗻 𝗯𝘂𝗶𝗹𝗱𝗶𝗻𝗴 𝘀𝘁𝗿𝗼𝗻𝗴 𝗰𝗼𝗻𝗰𝗲𝗽𝘁𝘀 𝗮𝗻𝗱 𝗽𝗿𝗼𝗯𝗹𝗲𝗺-𝘀𝗼𝗹𝘃𝗶𝗻𝗴 𝘀𝗸𝗶𝗹𝗹𝘀
📍 𝗟𝗶𝗺𝗶𝘁𝗲𝗱 𝗦𝗲𝗮𝘁𝘀 𝗔𝘃𝗮𝗶𝗹𝗮𝗯𝗹𝗲
𝗗𝗼𝗻’𝘁 𝗺𝗶𝘀𝘀 𝗼𝘂𝘁 𝗼𝗻 𝘁𝗵𝗶𝘀 𝗼𝗽𝗽𝗼𝗿𝘁𝘂𝗻𝗶𝘁𝘆 𝘁𝗼 𝗲𝘅𝗰𝗲𝗹! 𝗙𝗼𝗿 𝗺𝗼𝗿𝗲 𝗱𝗲𝘁𝗮𝗶𝗹𝘀, 𝗰𝗼𝗻𝘁𝗮𝗰𝘁 𝘂𝘀 𝗮𝘁

Physics Term of the Day (08/06/2025)

🎓𝑶/𝑨 𝑳𝒆𝒗𝒆𝒍 𝙋𝙃𝙔𝙎𝙄𝘾𝙎 𝑨𝒅𝒎𝒊𝒔𝒔𝒊𝒐𝒏 𝑶𝒑𝒆𝒏🎓
📢 𝗙𝗼𝗿 𝗢 & 𝗔 𝗹𝗲𝘃𝗲𝗹 𝗦𝗲𝘀𝘀𝗶𝗼𝗻 𝟮𝟬𝟮𝟱-𝟮𝟬𝟮𝟲
𝗨𝗻𝗹𝗼𝗰𝗸 𝘁𝗵𝗲 𝘀𝗲𝗰𝗿𝗲𝘁𝘀 𝗼𝗳 𝗣𝗵𝘆𝘀𝗶𝗰𝘀 𝘄𝗶𝘁𝗵 𝐄𝐧𝐠𝐫 𝐙𝐨𝐛𝐚𝐲𝐞𝐫 𝐒𝐢𝐫, 𝗮 𝘀𝗲𝗮𝘀𝗼𝗻𝗲𝗱 𝗲𝗱𝘂𝗰𝗮𝘁𝗼𝗿 𝘄𝗶𝘁𝗵 𝘆𝗲𝗮𝗿𝘀 𝗼𝗳 𝘁𝗲𝗮𝗰𝗵𝗶𝗻𝗴 𝗲𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲! 🌟
𝗪𝗵𝗮𝘁 𝘄𝗲 𝗼𝗳𝗳𝗲𝗿:
✅ 𝗘𝘅𝗽𝗲𝗿𝘁 𝗟𝗲𝗰𝘁𝘂𝗿𝗲𝘀: 𝗜𝗻-𝗱𝗲𝗽𝘁𝗵 𝗰𝗼𝘃𝗲𝗿𝗮𝗴𝗲 𝗼𝗳 𝗮𝗹𝗹 𝘁𝗼𝗽𝗶𝗰𝘀
✅ 𝗤𝘂𝗲𝘀𝘁𝗶𝗼𝗻 𝗣𝗮𝗽𝗲𝗿 𝗦𝗼𝗹𝘃𝗶𝗻𝗴 𝗩𝗶𝗱𝗲𝗼𝘀: 𝗕𝗼𝗼𝘀𝘁 𝘆𝗼𝘂𝗿 𝗽𝗿𝗼𝗯𝗹𝗲𝗺-𝘀𝗼𝗹𝘃𝗶𝗻𝗴 𝘀𝗸𝗶𝗹𝗹𝘀 𝘄𝗶𝘁𝗵 𝗼𝘂𝗿 𝗱𝗲𝘁𝗮𝗶𝗹𝗲𝗱 𝘀𝗼𝗹𝘂𝘁𝗶𝗼𝗻𝘀
✅ 𝗙𝘂𝗹𝗹 𝗠𝗼𝗰𝗸 𝗧𝗲𝘀𝘁𝘀: 𝗦𝗶𝗺𝘂𝗹𝗮𝘁𝗲 𝗲𝘅𝗮𝗺 𝗰𝗼𝗻𝗱𝗶𝘁𝗶𝗼𝗻𝘀 𝘁𝗼 𝗺𝗮𝘅𝗶𝗺𝗶𝘇𝗲 𝘆𝗼𝘂𝗿 𝗽𝗲𝗿𝗳𝗼𝗿𝗺𝗮𝗻𝗰𝗲
✅ 𝗜𝗻𝘁𝗲𝗿𝗮𝗰𝘁𝗶𝘃𝗲 𝗦𝗼𝗹𝘃𝗶𝗻𝗴 𝗖𝗹𝗮𝘀𝘀𝗲𝘀: 𝗣𝗲𝗿𝘀𝗼𝗻𝗮𝗹𝗶𝘇𝗲𝗱 𝗮𝘁𝘁𝗲𝗻𝘁𝗶𝗼𝗻 𝘁𝗼 𝗰𝗹𝗲𝗮𝗿 𝗱𝗼𝘂𝗯𝘁𝘀 𝗮𝗻𝗱 𝘀𝘁𝗿𝗲𝗻𝗴𝘁𝗵𝗲𝗻 𝗰𝗼𝗻𝗰𝗲𝗽𝘁𝘀.
🧤
𝗝𝗼𝗶𝗻 𝘂𝘀 𝘁𝗼𝗱𝗮𝘆 𝗮𝗻𝗱 𝘀𝘁𝗮𝗿𝘁 𝘆𝗼𝘂𝗿 𝗷𝗼𝘂𝗿𝗻𝗲𝘆 𝘁𝗼 𝘀𝘂𝗰𝗰𝗲𝘀𝘀 𝘄𝗶𝘁𝗵 𝘁𝗵𝗲 𝗯𝗲𝘀𝘁 𝗶𝗻 𝘁𝗵𝗲 𝗳𝗶𝗲𝗹𝗱!
🎯 𝗪𝗵𝘆 𝗖𝗵𝗼𝗼𝘀𝗲 𝐄𝐧𝐠𝐫 𝐙𝐨𝐛𝐚𝐲𝐞𝐫 𝐒𝐢𝐫's 𝗖𝗼𝗮𝗰𝗵𝗶𝗻𝗴:
𝗣𝗿𝗼𝘃𝗲𝗻 𝘀𝘂𝗰𝗰𝗲𝘀𝘀 𝘄𝗶𝘁𝗵 𝘀𝘁𝘂𝗱𝗲𝗻𝘁𝘀
𝗖𝗹𝗲𝗮𝗿 𝗮𝗻𝗱 𝗰𝗼𝗻𝗰𝗶𝘀𝗲 𝘁𝗲𝗮𝗰𝗵𝗶𝗻𝗴 𝗺𝗲𝘁𝗵𝗼𝗱𝘀
𝗙𝗼𝗰𝘂𝘀𝗲𝗱 𝗼𝗻 𝗯𝘂𝗶𝗹𝗱𝗶𝗻𝗴 𝘀𝘁𝗿𝗼𝗻𝗴 𝗰𝗼𝗻𝗰𝗲𝗽𝘁𝘀 𝗮𝗻𝗱 𝗽𝗿𝗼𝗯𝗹𝗲𝗺-𝘀𝗼𝗹𝘃𝗶𝗻𝗴 𝘀𝗸𝗶𝗹𝗹𝘀
📍 𝗟𝗶𝗺𝗶𝘁𝗲𝗱 𝗦𝗲𝗮𝘁𝘀 𝗔𝘃𝗮𝗶𝗹𝗮𝗯𝗹𝗲
𝗗𝗼𝗻’𝘁 𝗺𝗶𝘀𝘀 𝗼𝘂𝘁 𝗼𝗻 𝘁𝗵𝗶𝘀 𝗼𝗽𝗽𝗼𝗿𝘁𝘂𝗻𝗶𝘁𝘆 𝘁𝗼 𝗲𝘅𝗰𝗲𝗹! 𝗙𝗼𝗿 𝗺𝗼𝗿𝗲 𝗱𝗲𝘁𝗮𝗶𝗹𝘀, 𝗰𝗼𝗻𝘁𝗮𝗰𝘁 𝘂𝘀 𝗮𝘁 01725-698706
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For over two decades, dark energy—the mysterious force pushing the universe apart—has been assumed to be constant, a steady backdrop fueling cosmic acceleration.

But now, new data from two major collaborations suggests that this may not be the case. According to recent findings presented at the Global Physics Summit in March 2025, dark energy might not be constant after all—it may be weakening, shaking the very core of modern cosmology.

The Dark Energy Spectroscopic Instrument (DESI) and the Dark Energy Survey (DES) have both reported results that point to a slow-down in the strength of dark energy—a potential sign that the universe’s accelerated expansion is changing course. This development directly challenges the Lambda-CDM model, the current standard model of cosmology, which assumes dark energy is a fixed “cosmological constant” as proposed by Einstein.

Using three years of data, the DESI team mapped the positions of over 15 million galaxies, measuring how matter has clustered across vast cosmic distances. These patterns, remnants of sound waves from the early universe, act like “cosmic fossils” that help trace how the expansion of the universe has evolved.

When DESI’s data was combined with supernova observations and measurements from the cosmic microwave background (CMB), researchers found something surprising: the data shows a 4.2-sigma tension with the standard model—a statistical measure that suggests there’s only a 1 in 30,000 chance the Lambda-CDM model is still correct.

The analysis points to a strange behavior in dark energy’s strength. For billions of years, it intensified, accelerating the universe’s expansion, but then began weakening around 6 billion years ago. This shift, known as “phantom crossing,” suggests a transition in how dark energy behaves over time.

Meanwhile, the DES collaboration, which surveyed 12% of the sky, found a 3.2-sigma tension with the standard model—independently supporting DESI’s conclusions. Their data, combining galaxy clustering, supernova light, and CMB measurements, also hints that dark energy may be dynamic, not constant.

If dark energy really is fading, the implications are massive. The fate of the universe itself could change. The widely accepted idea that the universe will continue expanding forever into a cold, dark “heat death” may be replaced by new possibilities—such as a slow-down in expansion, a Big Crunch (where the universe collapses in on itself), or a new phase of cosmic evolution.

RESEARCH PAPER 📄
DESI Collaboration, "DESI DR2 Results II: Measurements of Baryon Acoustic Oscillations and Cosmological Constraints", arxiv (2025)

🎓 𝗣𝗵𝘆𝘀𝗶𝗰𝘀 𝗖𝗼𝗮𝗰𝗵𝗶𝗻𝗴 𝗔𝗱𝗺𝗶𝘀𝘀𝗶𝗼𝗻 𝗢𝗽𝗲𝗻!🎓
📢 𝗙𝗼𝗿 𝗢 & 𝗔 𝗹𝗲𝘃𝗲𝗹 𝗦𝗲𝘀𝘀𝗶𝗼𝗻 𝟮𝟬𝟮𝟱-𝟮𝟬𝟮𝟲
𝗨𝗻𝗹𝗼𝗰𝗸 𝘁𝗵𝗲 𝘀𝗲𝗰𝗿𝗲𝘁𝘀 𝗼𝗳 𝗣𝗵𝘆𝘀𝗶𝗰𝘀 𝘄𝗶𝘁𝗵 𝗠𝗮𝗵𝗶 𝗦𝗶𝗿, 𝗮 𝘀𝗲𝗮𝘀𝗼𝗻𝗲𝗱 𝗲𝗱𝘂𝗰𝗮𝘁𝗼𝗿 𝘄𝗶𝘁𝗵 𝘆𝗲𝗮𝗿𝘀 𝗼𝗳 𝘁𝗲𝗮𝗰𝗵𝗶𝗻𝗴 𝗲𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲! 🌟
𝗪𝗵𝗮𝘁 𝘄𝗲 𝗼𝗳𝗳𝗲𝗿:
✅ 𝗘𝘅𝗽𝗲𝗿𝘁 𝗟𝗲𝗰𝘁𝘂𝗿𝗲𝘀: 𝗜𝗻-𝗱𝗲𝗽𝘁𝗵 𝗰𝗼𝘃𝗲𝗿𝗮𝗴𝗲 𝗼𝗳 𝗮𝗹𝗹 𝘁𝗼𝗽𝗶𝗰𝘀
✅ 𝗤𝘂𝗲𝘀𝘁𝗶𝗼𝗻 𝗣𝗮𝗽𝗲𝗿 𝗦𝗼𝗹𝘃𝗶𝗻𝗴 𝗩𝗶𝗱𝗲𝗼𝘀: 𝗕𝗼𝗼𝘀𝘁 𝘆𝗼𝘂𝗿 𝗽𝗿𝗼𝗯𝗹𝗲𝗺-𝘀𝗼𝗹𝘃𝗶𝗻𝗴 𝘀𝗸𝗶𝗹𝗹𝘀 𝘄𝗶𝘁𝗵 𝗼𝘂𝗿 𝗱𝗲𝘁𝗮𝗶𝗹𝗲𝗱 𝘀𝗼𝗹𝘂𝘁𝗶𝗼𝗻𝘀
✅ 𝗙𝘂𝗹𝗹 𝗠𝗼𝗰𝗸 𝗧𝗲𝘀𝘁𝘀: 𝗦𝗶𝗺𝘂𝗹𝗮𝘁𝗲 𝗲𝘅𝗮𝗺 𝗰𝗼𝗻𝗱𝗶𝘁𝗶𝗼𝗻𝘀 𝘁𝗼 𝗺𝗮𝘅𝗶𝗺𝗶𝘇𝗲 𝘆𝗼𝘂𝗿 𝗽𝗲𝗿𝗳𝗼𝗿𝗺𝗮𝗻𝗰𝗲
✅ 𝗜𝗻𝘁𝗲𝗿𝗮𝗰𝘁𝗶𝘃𝗲 𝗦𝗼𝗹𝘃𝗶𝗻𝗴 𝗖𝗹𝗮𝘀𝘀𝗲𝘀: 𝗣𝗲𝗿𝘀𝗼𝗻𝗮𝗹𝗶𝘇𝗲𝗱 𝗮𝘁𝘁𝗲𝗻𝘁𝗶𝗼𝗻 𝘁𝗼 𝗰𝗹𝗲𝗮𝗿 𝗱𝗼𝘂𝗯𝘁𝘀 𝗮𝗻𝗱 𝘀𝘁𝗿𝗲𝗻𝗴𝘁𝗵𝗲𝗻 𝗰𝗼𝗻𝗰𝗲𝗽𝘁𝘀.
🧤
𝗝𝗼𝗶𝗻 𝘂𝘀 𝘁𝗼𝗱𝗮𝘆 𝗮𝗻𝗱 𝘀𝘁𝗮𝗿𝘁 𝘆𝗼𝘂𝗿 𝗷𝗼𝘂𝗿𝗻𝗲𝘆 𝘁𝗼 𝘀𝘂𝗰𝗰𝗲𝘀𝘀 𝘄𝗶𝘁𝗵 𝘁𝗵𝗲 𝗯𝗲𝘀𝘁 𝗶𝗻 𝘁𝗵𝗲 𝗳𝗶𝗲𝗹𝗱!
🎯 𝗪𝗵𝘆 𝗖𝗵𝗼𝗼𝘀𝗲 Zobayer Sir's 𝗖𝗼𝗮𝗰𝗵𝗶𝗻𝗴:
𝗣𝗿𝗼𝘃𝗲𝗻 𝘀𝘂𝗰𝗰𝗲𝘀𝘀 𝘄𝗶𝘁𝗵 𝘀𝘁𝘂𝗱𝗲𝗻𝘁𝘀
𝗖𝗹𝗲𝗮𝗿 𝗮𝗻𝗱 𝗰𝗼𝗻𝗰𝗶𝘀𝗲 𝘁𝗲𝗮𝗰𝗵𝗶𝗻𝗴 𝗺𝗲𝘁𝗵𝗼𝗱𝘀
𝗙𝗼𝗰𝘂𝘀𝗲𝗱 𝗼𝗻 𝗯𝘂𝗶𝗹𝗱𝗶𝗻𝗴 𝘀𝘁𝗿𝗼𝗻𝗴 𝗰𝗼𝗻𝗰𝗲𝗽𝘁𝘀 𝗮𝗻𝗱 𝗽𝗿𝗼𝗯𝗹𝗲𝗺-𝘀𝗼𝗹𝘃𝗶𝗻𝗴 𝘀𝗸𝗶𝗹𝗹𝘀
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