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Magnifying Glass Tilted Right

Theme D - Fields

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Rocket

Theme A - Space, Time & Motion

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Thermometer

Theme B - The Particulate Nature Of Matter

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Water Wave

Theme C - Wave Behaviour 

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Microscope

Theme E - Nuclear & Quantum Physics

A field is a cool concept in physics where an object, like our planet Earth, can pull or push another object without touching it! Kind of like magic, but real!

<ul>
	<li>You feel Earth&#39;s pull when you pick up a stone. Let it go, and it dashes towards the ground.</li>
	<li>This pull, the gravitational force, acts even if there&#39;s no direct touch.</li>
</ul>

Real-world analogy:&nbsp;Imagine a magnetic force between two magnets even when they&#39;re not touching. That&#39;s a field!

Suppose you&#39;ve two masses (or objects) floating in space - A and B.

<ul>
	<li>Mass A is being pulled by mass B and vice-versa.</li>
	<li>Even if they&#39;re different in size, the pull (or force) they exert on each other is the same strength but in opposite directions.</li>
</ul>

A field exists when an object can influence another from a distance. Every object with mass (like planets or stars) has its gravitational field. And any other mass that enters this field feels the pull!

Objects influencing each other without touching! It was a big change in how scientists thought. Imagine having a superpower where you can move things without touching them!

Being consistent in how we describe things in science

<ul>
	<li>Makes learning easier.</li>
	<li>Helps scientists all over the world understand each other better.</li>
	<li>Makes collaboration smoother.</li>
</ul>

Example 
In cooking, imagine if everyone had different names for &#39;salt&#39;. Confusing, right? That&#39;s why having consistent terms is key!

<ul>
	<li>
	Time Delay: Older theories said no time delay in fields, but modern ones like Einstein&#39;s general relativity say otherwise.
	</li>
	<li>
	Gravitational Waves: Waves in the gravitational field caused by super big, fast-moving objects. These were first detected in 2015. Imagine throwing a stone in a pond. The ripples? Those are like gravitational waves but in space!

	<ul>
		<li>Real-world example: In 2016, scientists detected gravitational waves from two neutron stars crashing into each other about 130 million light years away. And guess what? These waves and gamma rays from the same event hit us just two seconds apart, showing these waves move at light speed!</li>
	</ul>
	</li>
	<li>
	Exchange Particles: Modern physics thinks of interactions using &#39;exchange particles&#39;. They&rsquo;re like the messengers that communicate forces between objects. For gravity, the theoretical messenger is called a graviton, which is thought to have no mass. But the full story on gravitons is still a mystery!
	</li>
</ul>

Fields allow objects to interact from a distance, making the universe an intricate dance of forces and interactions. And as we learn more, we realize there&#39;s so much more to discover in the vast cosmos!

&nbsp;

📝 Did you know? Gravitational waves give us a whole new way to study space, much like seeing in a new color! 🌈

Theme D - Fields

Newton's Gravitation & The Shift to Heliocentrism

Table of content

What's a field? 🌍

Two masses in space - a & b 🚀

Field definition 📖

What’s "action at a distance"? 💡

Unlock the Full Content!

Theme D - Fields

Newton's Gravitation & The Shift to Heliocentrism

Table of content

What's a field? 🌍

Two masses in space - a & b 🚀

Field definition 📖

What’s "action at a distance"? 💡

Unlock the Full Content!