Galileo's Laws of Motion

Galileo developed the concept of motion in terms of velocity (speed and direction) and used inclined planes to demonstrate this concept.

The natural state of an object is rest or uniform motion.

Friction

<p>The ball would never stop.</p> Signup and view all the answers

<p>The presence of friction.</p> Signup and view all the answers

<p>Light can behave both as a wave and as a particle. As a wave, it can diffract or bend around an object, undergo interference, and change direction as it travels through materials of different refractive indices. As a particle, it travels in straight lines, producing shadows, and can be reflected off mirrors, undergo refraction, and exhibit the photo-electric effect.</p> Signup and view all the answers

<p>Refraction is caused by opposing forces pulling the particles of light from and into the medium, resulting in changes of their direction. This occurs when light particles traverse through media or materials of different refractive indices.</p> Signup and view all the answers

<p>The photo-electric effect is a phenomenon where light with enough energy falls or hits a metal, dislodging electrons and producing a positive (+) metal surface. This demonstrates the particle-like behavior of light, as the energy of the light is transferred to the electrons in a quantized manner.</p> Signup and view all the answers

<p>Diffraction is the phenomenon where light waves change direction as they pass through an opening or around obstacles along their path. This demonstrates the wave-like behavior of light, as it can bend around objects and exhibit interference patterns.</p> Signup and view all the answers

<p>When light travels through materials of different refractive indices, it changes direction, resulting in refraction. This occurs due to the opposing forces pulling the particles of light from and into the medium.</p> Signup and view all the answers

<p>The energy of a photon (light particle) is dependent on the frequency of the light. Light with a higher frequency has a higher energy, and vice versa.</p> Signup and view all the answers

<p>The light waves bounce off or reflect according to the arrival angles, producing a reversed image.</p> Signup and view all the answers

<p>The light bends, changing direction, due to the difference in refractive indices.</p> Signup and view all the answers

<p>The particles change direction due to a special force directed perpendicular to the interface.</p> Signup and view all the answers

<p>A plane mirror.</p> Signup and view all the answers

<p>A small portion of each angled wavefront impacts the second medium before the rest of the front reaches the interface.</p> Signup and view all the answers

<p>A reversed image is produced.</p> Signup and view all the answers