Partial eclipse of the sun August 21

Dear Editor,

There will be a partial eclipse of the Sun mid-afternoon of Monday August 21, 2017, because some of the Moon’s shadow will fall on us as the Moon gets into our line of sight with the Sun. Notable events are listed in the following table:

A total eclipse will be experienced in the USA and there should be a plethora of information available online. In Guyana we will experience at most about 64% of the Sun being blotted out at mid-eclipse. The next such partial eclipse is expected October 14, 2023.

Do not look directly at the Sun. Use safe filters, or, best of all, view an image of the Sun projected onto a suitable background through a pinhole in a sheet of cardboard.

Those intending to write Physics at CXC can use the opportunity to perform an experiment with shadows. Bore small holes of different sizes in a sheet of cardboard to allow the sunlight to pass though the holes onto the ground. That is all the apparatus that will be required. Observe which holes give sharper and which give brighter images of the Sun. Carry the cardboard anywhere in the sunlight and observe the movement of the Moon’s shadow around the image of the Sun during the partial eclipse. Note that the image on the ground will be upside down. This means that at 3 pm the Moon will block the Sun from the lower right of the disc in the sky, but that blockage will appear at the upper right of the disc projected through the cardboard onto the ground.

Write a report with diagrams and observations explaining the sharpness, brightness and inversion of the images, and submit to your Physics teacher to be assessed for ORR (observation, recording and reporting) and AI (analysis and interpretation).

I am not including a diagram of the partial eclipse at 5 pm, because I want to see what my own students will show me.

Yours faithfully,

Alfred Bhulai

Editor’s note: An earlier version of this letter incorrectly stated in the headline that the eclipse would be tomorrow. It will occur on August 21st.

Comments  

It is time to denounce homophobia

Dear Editor, The news about the march against homosexuality in Linden on 19 August, 2017 shows the dilemma in a country which is yet to understand human rights.

It is time for the controversy in which the Guyana Cricket Board is embroiled to be resolved

Dear Editor, On Saturday 19th, August, I followed the performance of our West Indies team responding to England’s 1st inning total of 514/8 declared in the first day/night-pinkball-Test match ever played in England.

Simpson should quote what threat was made to him

Dear Editor, As the organizer and an apostle of Yehsua the messiah, it is necessary for me to give redress to the some contents of the article captioned ‘Linden church leader stages march against homosexuality’ published in Sunday Stabroek, August 20.

After five years Region 10 Agreement still not honoured

Dear Editor, August 21 marked five years since central government signed an agreement with the Region 10 Regional Democratic Council, and it is yet to be honoured.

The pastor’s cause was utterly repugnant

Dear Editor, On Saturday, the 20th of August, a pastor in Linden staged a march against homosexuality and expressed his displeasure in President David Granger’s consideration of repealing the current laws which criminalise homosexual acts.

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