Science melas in connection with national science campaign
This series of two classroom lectures will cover the fundamentals of lasers: how they work, what are their characteristics and what are their important types. We will also discuss some of their exciting and useful applications in industry, medicine, communications, optical disks and art and culture. This is in celebration of 50 years of this exciting discovery. Science students (B.Sc. level) are especially welcome to attend. The lectures are in fact part of a semester long course on Atomic and Laser Physics.
Come to our tenth falakyati mela, a part of the World Space Week organzied by SUPRACO. See the Jupiter, nebulae and star clusters. Visit stalls from various schools and have a refreshing evening, with the heavens.
We will have a great lunar landscape in the view with many important and stunning craters. Jupiter and its moons will also be visible around 20:15. Also I can show our nearest Andromeda Galaxy, Ring Nebula the famous star corpse and a very fine star cluster M13.
It will be a blessed night indeed when we can observe planets (including Venus if we can assemble our equipment well before sunset), star cluster, galaxy and a nebula. What else can we ask from a night sky!
Of course all depending on weather.
The origin of Galactic cosmic-ray ions has remained an enigma for almost a century. Although it has generally been thought that they are accelerated in the shock waves associated with powerful supernova explosions—for which there have been recent claims of evidence—the mystery is far from resolved. Cosmic rays, which are mostly protons, but also other ions and electrons, permeate our Galaxy and rain down on earth continuously, night and day. Although cosmic rays were discovered almost a century ago, back in the balloon age, their origins remain unclear even now. Almost no effort has been spared in pursuing this long-standing mystery: satellites, rockets and balloons have been launched, and enormous detector arrays have been installed on the ground and even under mountains and seas. I will give a historical overview of the search for the mysterious origin of cosmic rays and a report on the current status.
Lasers from Islamabad, Lahore and Cern: What Binds them Together (Dr. Shaukat Hameed Khan)
The laser is just 50 years old but it is shaping our lives in diverse manners. One key area is precision of measurement. A small Pakistani innovation to the design of the system which makes up the massive detectors in the Large Hadron Collidor at CERN in Geneva is discussed. This is placed in the context of mankind’s greater quest over the centuries for precision, whether these relate to his position on earth or in space, or timekeeping. The principal features of the laser programme in Pakistan is presented briefly.
Laser-generated Pulsed X-ray Sources (Dr. Fida Khattak)
I would be presenting the basic principles of x-ray generation via different schemes using high power laser pulses for the non-specialized. I would be also presenting some experimental results for the audience having research interest in the field.
Fundamentals of Fiber-optic Communications (Dr. Mumtaz Sheikh)
Ever since the advent of the internet, fiber optic communication systems play an important role in our everyday lives. This talk would focus on how do these systems work, what is so special about them compared to traditional electrical communication systems, what kind of
lasers are suitable for such systems, what are some of the issues and tradeoffs that a designer has to consider while designing such systems and where is the technology headed in the future.
Light: Its Applications in Interferometery, Polarimetry and Photodynamic Therapy (Dr. Masroor Ikram)
Light is one of the oldest subject but its true nature has yet to be fully discovered. For more than hundred years its dual nature is well accepted. Optics and Laser Group in PIEAS has worked on some of its applications. Michelson interferometer was reported in the late nineteenth century but its use for precise measurement of angle and axis of rotation is reported very recently. Polarization imaging can produce very high contrast and the technique is useful for material characterization. Photodynamic therapy is an emerging technique to cure the cancers with high selectivity. In the technique, two individually non-toxic components brought together to cause harmful effects on cells and tissues in the presence of oxygen.
The event is subject to clear weather conditions. The viewing will be through the telescope eyepiece.
The directions to the location can be found at: http://www.khwarzimic.org/iya/pu_map_track.jpg .