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# International Baccalaureate: Physics

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• Marked by Teachers essays 2
1. ## Light Intensity Investigation

Due to this, increasing distance ultimately decreases the illuminance (how much light from a source hits a specific object) and thus, the light intensity. VARIABLES The independent variable (the variable being changed): The independent variable is going to be the distance between the light sensor and the light source (cm) with measurements varying from 10cm-100cm and increasing at 10cm increments. We will do this in order to see the effects varying distance has on light intensity. The variable will be altered by increasing the distance between the two objects by 10cm (interval length) for each set of trials. We will measure and change this gap by using a metre ruler to determine the exact distance and then we will place the light source at one end and the sensor at the determined mark on the ruler.

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"The boldness of asking deep questions may require unforeseen flexibility if we are to accept the answers."

-Brian Greene

If you want to learn about the physical laws that govern the behaviour of everything in the universe, then chances are you'd enjoy studying physics as part of your IB diploma. Physics is one of six subjects on offer in group 4, and gives students a grounding in the scientific method, lab work, and range of theoretical concepts. The theory portion begins with building blocks like mechanics, electric currents, and waves, and builds up to advanced topics like astrophysics and particle physics.

Physics will require a fair amount of writing, often in the form of lab reports. If you need to refine your writing skills, come visit our collection of student-submitted IB physics papers. Study the teacher-marked and peer-reviewed papers alongside your own work, and before long, you'll know how to edit and re-write assignments to your teachers' high standards.

Students who get good marks in physics, and especially in high level physics, will leave school well positioned to apply for a range of university course within the physical and biological sciences.

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