Measuring Instantaneous speed

Posted by Mr Mallon on October 20, 2023

It is impossible to measure the speed of an object at an instant.
It is only possible to find the object’s speed over a small distance and time.
This is achieved using a light gate and a thin card of length say 10 cm.
When the card interrupts the light beam it turns off a light sensor and starts an electronic timer.
The timer stops when the card passes the light beam and the sensor picks up the light signal again.

The near instantaneous speed is calculated by:

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The Hunt for Exoplanets

Posted by Mr Mallon on February 26, 2023

Click the above picture for information on how astronomers detect exoplanets.
Exoplanets are planets orbiting a star outside our solar system.

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Code a useful physics calculation

Posted by Mr Mallon on April 30, 2022

Categories: Physics News
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Juno meets up with Jupiter

Posted by Mr Mallon on July 5, 2016

The spacecraft Juno entered into orbit around the the giant planet Jupiter today.
Find out more from this slide show.

Categories: Physics News
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Playing with code

Posted by Mr Mallon on September 15, 2015

Coding has been getting big exposure lately. Using it to model physics situations not only helps you with coding but helps you really master those kinematic equations.

Categories: Physics News
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Gemini and Jupiter

Posted by Mr Mallon on December 16, 2013


Click on the picture above to see a clearer image of the constellation Gemini with the king planet Jupiter.
This picture was taken on Friday 13th December 2013 around 2300 hours using my small Panasonic Digital camera set to night sky mode.

Now compare this star chart from the fabulous Heavens Above site

Gemini Star Chart

Categories: Physics News
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Story of the Atom.

Posted by Mr Mallon on January 12, 2013

Here is a little podcast you can download to find out about the story of the atom.
The amazing discoveries and investigations that lead to our knowledge of the atom.

Listen to the story here

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Neil Armstrong 1930 – 2012

Posted by Mr Mallon on August 25, 2012

Just over forty three years ago, just as this picture was taken, a bleary eyed wee boy was thrilled to the limit watching those grey tv pictures of men walking on the moon.

It is a moment in history that is forever etched into my memory. As I `ve said before in these pages I am eternally grateful to my father for getting me up that wonderful July morning to witness history being made.

Tonight I learned of the death of Neil Armstrong, the first man to walk on the moon.

Neil Armstrong… God`s speed to you!

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Professor Peter Higgs

Posted by Mr Mallon on July 5, 2012

A painting of Professor Peter Higgs at the National Portrait Gallery, Edinburgh.
I think they will need to update the small caption pretty soon as it tells us the Higgs particle is still to be found.

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Good explanation of today`s discovery.

Posted by Mr Mallon on July 4, 2012

Categories: Physics News
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