Wave Properties and Types

An enlarged and upright image is formed.

Red, orange, yellow, green, blue, indigo, violet.

Longer wavelengths travel slower in glass.

<p>As wavelength decreases, frequency increases.</p> Signup and view all the answers

<p>Microwaves are used for satellite communication and in microwave ovens.</p> Signup and view all the answers

<p>Increased risk of skin cancer.</p> Signup and view all the answers

<p>X-rays are used for medical imaging as they can easily penetrate materials.</p> Signup and view all the answers

<p>Infrared radiation is used in remote controllers.</p> Signup and view all the answers

<p>Waves spread out more when they pass through a narrow gap or around an obstacle.</p> Signup and view all the answers

<p>The wavelength shortens as waves slow down when moving from deep to shallow water.</p> Signup and view all the answers

<p>When waves strike a barrier, the angle of incidence equals the angle of reflection as the waves bounce off.</p> Signup and view all the answers

<p>The amount of diffraction increases as the gap size decreases relative to the wavelength.</p> Signup and view all the answers

<p>Waves bend around the edge of a barrier, spreading into the region behind it, illustrating diffraction.</p> Signup and view all the answers

<p>Waves slow down in shallower water, causing a decrease in their speed and wavelength.</p> Signup and view all the answers

<p>Longer wavelengths, being more comparable in size to obstacles, can bend around edges more effectively.</p> Signup and view all the answers

<p>The vibrating paddle generates waves by creating disturbances in the water's surface.</p> Signup and view all the answers

<p>X-rays and gamma rays.</p> Signup and view all the answers

<p>They can penetrate the Earth's atmosphere effectively.</p> Signup and view all the answers

<p>$3.0 imes 10^8$ m/s.</p> Signup and view all the answers

<p>Digital signals consist of discrete binary values (0s and 1s), while analogue signals vary continuously.</p> Signup and view all the answers

<p>Higher data transmission rates and accurate signal regeneration.</p> Signup and view all the answers

<p>They use visible light or infrared to transmit data efficiently.</p> Signup and view all the answers

<p>Bluetooth uses low-energy radio waves or microwaves which can penetrate walls but weaken when passing through them.</p> Signup and view all the answers

<p>Geostationary satellites.</p> Signup and view all the answers

<p>Amplitude is the distance from the equilibrium position to the maximum displacement of a wave.</p> Signup and view all the answers

<p>The speed of a wave is related to its frequency and wavelength by the equation $v = f\lambda$, where $v$ is speed, $f$ is frequency, and $\lambda$ is wavelength.</p> Signup and view all the answers

<p>Transverse waves have vibrations at right angles to the direction of travel, whereas longitudinal waves have vibrations in the same direction as the travel.</p> Signup and view all the answers

<p>Waves reflect off smooth surfaces at an angle equal to the angle of incidence, following the law of reflection.</p> Signup and view all the answers

<p>When a wave enters a more optically dense medium, its speed decreases and it bends towards the normal.</p> Signup and view all the answers

<p>Rough surfaces scatter waves in all directions, making them appear matte and unreflective instead of reflecting them uniformly.</p> Signup and view all the answers

<p>A wavefront is a surface containing points affected in the same way by a wave, such as crests or troughs, and it represents the propagation of the wave.</p> Signup and view all the answers

<p>The frequency of a wave remains unchanged during refraction while its speed and wavelength change.</p> Signup and view all the answers

<p>The refractive index n is the ratio of the speed of light in a vacuum to the speed of light in the medium.</p> Signup and view all the answers

<p>Snell's law states that n = sin(i) / sin(r), where i is the angle of incidence and r is the angle of refraction.</p> Signup and view all the answers

<p>Total internal reflection occurs when light travels from a more optically dense medium to a less optically dense medium at an angle greater than the critical angle.</p> Signup and view all the answers

<p>The critical angle is the angle of incidence above which total internal reflection occurs.</p> Signup and view all the answers

<p>Optical fibers use total internal reflection to transfer information through light, even when bent.</p> Signup and view all the answers

<p>A converging lens focuses light rays to a point known as the principal focus.</p> Signup and view all the answers

<p>A real image is formed when the object is placed at a distance greater than the focal length from the lens.</p> Signup and view all the answers

<p>A virtual image occurs when the object distance is less than the focal length, making it appear to converge but not actually do so.</p> Signup and view all the answers

<p>A greater amplitude of a sound wave results in a louder sound.</p> Signup and view all the answers

<p>Higher frequency sound waves produce a higher pitch.</p> Signup and view all the answers

<p>The speed of sound is calculated using the formula speed = distance/time, considering the round trip of the sound.</p> Signup and view all the answers

<p>The speed of sound in air is 343 m/s.</p> Signup and view all the answers

<p>Ultrasound is sound with a frequency greater than 20,000 Hz, commonly used in medical imaging.</p> Signup and view all the answers

<p>Compressions are areas of high pressure where particles are close together, while rarefactions are areas of low pressure with spaced-out particles.</p> Signup and view all the answers

<p>Sound travels faster in solids due to strong intermolecular forces and closely packed particles, allowing efficient energy transfer.</p> Signup and view all the answers

<p>Sonar emits ultrasound, which partially reflects at material boundaries to identify flaws without damaging them.</p> Signup and view all the answers