Light SAQ

The bouncing of light off an object.

It is the reflection of light off a rough surface in which it is scattered in all directions.

Actual intersection of light rays.

<p>Real and Virtual images.</p> Signup and view all the answers

<p>Only Virtual images.</p> Signup and view all the answers

<p>The image gets bigger.</p> Signup and view all the answers

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

<p>Because the convex mirror provides a wide field of view.</p> Signup and view all the answers

<p>The incident ray, the normal at the point of incidence, and the reflected ray all lie in the same plane.</p> Signup and view all the answers

<p>1/f = 1/u + 1/v</p> Signup and view all the answers

<p>Concave mirror</p> Signup and view all the answers

<p>The bending of a ray of light when it goes from one medium to another</p> Signup and view all the answers

<p>The ratio of the sine of the angle of incidence to the sine of the angle of refraction is a constant for two given media</p> Signup and view all the answers

<p>The angle of incidence whose corresponding angle of refraction is 90 degrees</p> Signup and view all the answers

<p>Optical fibres A very thin transparent rod (usually of glass) through which light can travel by total internal reflection</p> Signup and view all the answers

<p>Convex lens</p> Signup and view all the answers

<p>Power (P) = 1/f</p> Signup and view all the answers

<p>P = P1 + P2</p> Signup and view all the answers

<p>The lens alongside the cornea produces a converging system</p> Signup and view all the answers

<p>Sin(i)/Sin(r) Ratio of sine of angle of incidence to sine of angle of refraction, calculated from vacuum into that medium</p> Signup and view all the answers

<p>Real images form due to actual intersection of light rays, virtual images form by apparent intersection</p> Signup and view all the answers

<p>Incident ray, normal, and reflected ray lie in same plane; angle of incidence equals angle of reflection</p> Signup and view all the answers

<p>Real image formed, located in front of the mirror</p> Signup and view all the answers

<p>Image size increases as the object approaches the mirror</p> Signup and view all the answers

<p>Regular reflection occurs on smooth surfaces, diffuse reflection occurs on rough surfaces</p> Signup and view all the answers

<p>Refractive index (n) = real depth/apparent depth</p> Signup and view all the answers

<p>Light is refracted towards the normal.</p> Signup and view all the answers

<p>An optical fibre is used to transmit light by total internal reflection.</p> Signup and view all the answers

<p>Snell's Law states that the ratio of the sine of the angle of incidence to the sine of the angle of refraction is a constant for two given media.</p> Signup and view all the answers

<p>Convex mirrors are used in supermarkets and cars to provide a wide field of view.</p> Signup and view all the answers

<p>Concave lenses (diverging) make light rays diverge.</p> Signup and view all the answers

<p>In a concave mirror, if the object is inside the focus, the image formed is virtual and located behind the mirror.</p> Signup and view all the answers

<p>Concave lenses produce only virtual images, while convex lenses can produce both real and virtual images.</p> Signup and view all the answers

<p>The critical angle is the angle of incidence at which the refracted ray is 90 degrees, leading to total internal reflection. It is crucial for understanding phenomena like optical fiber communication.</p> Signup and view all the answers

<p>Torchs, Headlights, Dentist Mirror, Searchlight</p> Signup and view all the answers

<p>Periscope</p> Signup and view all the answers

<p>Normal at the point of incidence</p> Signup and view all the answers

<p>Angle of incidence</p> Signup and view all the answers