David Lau

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A Tale of Nobody

Her birthday has gone by And nobody sent her a present Nobody thinks of her that way Another Xmas and New Year have gone by And nobody was there to celebrate with her Nobody cares about her that way She… Continue Reading →

Are wave functions real? Objective reality vs subjective state of knowledge about the observer.

Quantum Mechanics is by far the best theory in describing the subatomic world. It is the physics applicable to particles no larger than the size of an atom. Quantum physics has given us the microchip technology, the computers, the cellular… Continue Reading →

On Dark Energy

From my previous blog on the legacy of Albert Einstein, he formulated the General Theory of Relativity in 1915 and became a celebrity in the world of science. General Relativity says that mass affects the shape of space and the… Continue Reading →

Christmas holidays in Hong Kong

Once again coming back to Hong Kong to spend Christmas and New Year holidays with family and friends. This must be my 25th visit in Hong Kong since Christmas of 1990 and always take a side trip elsewhere in Asia… Continue Reading →

The Benefits of Particle Physics

The subject of particle physics remains relatively blurry among the general population. The standard model was established back in 1970’s and it has flourished ever since ,  making the model very successful and it is the backbone of quantum field… Continue Reading →

Reflection on Thanksgiving

Here I am in Las Vegas again to spending Thanksgiving Holidays. I must have been in Las Vegas for more than 100 times in the last 20 years, making this City of Sin my second home town where I am… Continue Reading →

Celebrating Einstein’s Legacy —–General Relativity

We have more reason to celebrate in the month of November besides Thanksgiving holidays. This year is the 100th birthday of Einstein’s theory of General Relativity. Since I will be in Las Vegas during the holiday season, there’s more reason and a… Continue Reading →

Fine-structure constant

In physics, the fine-structure constant, also known as Sommerfeld’s constant, is a fundamental physical constant characterizing the strength of the electromagnetic interaction between elementary particles. This constant is expressed by combining several other fundamental constants of nature:        … Continue Reading →

On Dark Matter

What can I say other than I am a strong supporter for dark matter theory. Dark matter is thought to make up 80% of the matter in the universe and because they do not interact with ordinary matter except via… Continue Reading →

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