Refraction of Light Quiz

Refraction defines the behavior of light as it bends when passing from one medium to another.

Law 1 states that the incident ray, normal line, and refracted ray are all in the same plane.

Snell's Law states that the ratio of the sine of the angle of incidence to the sine of the angle of refraction is constant for two media.

<p>The refractive index indicates that light bends more when moving to a medium with a higher refractive index, which is always greater than 1.</p> Signup and view all the answers

<p>When light travels from a rarer medium to a denser medium, it is refracted towards the normal.</p> Signup and view all the answers

<p>Light is refracted away from the normal when moving from a denser medium to a rarer medium.</p> Signup and view all the answers

<p>Snell's Law describes how light refracts when moving between two media, stating that the product of the sine of the angle of incidence and the refractive index of the first medium equals the product of the sine of the angle of refraction and the refractive index of the second medium.</p> Signup and view all the answers

<p>The refractive index from glass to air can be calculated as the reciprocal of the refractive index of glass, resulting in a value of $rac{2}{3}$ or approximately 0.67.</p> Signup and view all the answers

<p>An object appears less deep due to the refraction of light at the surface of the medium, which bends the rays towards the observer, altering the perceived depth.</p> Signup and view all the answers

<p>Total internal reflection occurs when light travels from a denser medium to a rarer medium and the angle of incidence exceeds the critical angle.</p> Signup and view all the answers

<p>The critical angle is the angle of incidence in a denser medium that results in an angle of refraction of 90°, meaning light is refracted along the boundary.</p> Signup and view all the answers

<p>When light moves from a vacuum into a denser medium, its speed decreases, causing it to bend toward the normal.</p> Signup and view all the answers

<p>In a denser medium, the wavelength of light decreases while the frequency remains constant, as the speed of light reduces.</p> Signup and view all the answers

<p>The sign indicates the type of lens; converging lenses have positive power, while diverging lenses have negative power.</p> Signup and view all the answers

<p>The total power is the algebraic sum of the individual powers of the lenses, considering their signs.</p> Signup and view all the answers

<p>Light is focused onto the retina by a converging system formed by the cornea and crystalline lens.</p> Signup and view all the answers

<p>Accommodation is the adjustment of the lens's focal length to ensure light rays focus properly on the retina.</p> Signup and view all the answers

<p>Short-sightedness prevents clear vision of distant objects, often due to an eyeball that is too long.</p> Signup and view all the answers

<p>Long-sightedness leads to difficulty in seeing near objects clearly, typically because the eyeball is too short.</p> Signup and view all the answers

<p>The iris regulates the amount of light entering the eye by adjusting the size of the pupil.</p> Signup and view all the answers

<p>The aqueous and vitreous humours aid in focusing light and maintaining the eye's shape.</p> Signup and view all the answers

<p>Snell's window is a bright circle seen by underwater divers, formed by light escaping at angles below the critical angle, making the surrounding area appear dark.</p> Signup and view all the answers

<p>Light rays hitting the surface at angles greater than the critical angle are reflected back into the water, while those below it escape into the air.</p> Signup and view all the answers

<p>A 45°–90°–45° prism can reflect light rays through angles of 90° or 180°.</p> Signup and view all the answers

<p>Mirages are caused by variations in air temperature, which change the refractive index of air, bending light rays.</p> Signup and view all the answers

<p>Total internal reflection is used in periscopes, prism binoculars, and bicycle reflectors.</p> Signup and view all the answers

<p>Shine a laser into the curved side of a semicircular prism at a small angle, gradually increase the angle until the emergent ray runs along the flat face, and observe further behavior.</p> Signup and view all the answers

<p>Optical fibers transmit light using total internal reflection, allowing light to reflect within the core while the cladding prevents escape.</p> Signup and view all the answers

<p>Optical fibers offer faster transmission speeds, more compact design, lower signal interference, and reduced power usage.</p> Signup and view all the answers

<p>An endoscope is used in minimally invasive surgeries, offering advantages such as smaller incisions, faster recovery, and access to difficult areas.</p> Signup and view all the answers

<p>Lenses are commonly used in glasses, contact lenses, cameras, telescopes, spectrometers, and CD/DVD players.</p> Signup and view all the answers

<p>Rays parallel to the principal axis are refracted through the focus of the lens.</p> Signup and view all the answers

<p>Rays passing through the focus are refracted to become parallel to the principal axis.</p> Signup and view all the answers

<p>The image is real, inverted, diminished, and located between F and 2F on the far side of the lens.</p> Signup and view all the answers

<p>The image is real, inverted, and the same size as the object, located at 2F on the far side of the lens.</p> Signup and view all the answers

<p>The image is real, inverted, and diminished, located beyond 2F on the far side of the lens.</p> Signup and view all the answers

<p>Rays passing through the center of the lens remain undeviated.</p> Signup and view all the answers

<p>The image is virtual, upright, magnified, and located behind the object.</p> Signup and view all the answers

<p>The image is virtual, upright, diminished, and located in front of the object.</p> Signup and view all the answers

<p>For a converging lens, the focal length (f) is positive; for a diverging lens, it is negative.</p> Signup and view all the answers