Description : 1. How many orangutans disappear each year as result of palm oil farming? 2. Who decides about the reasonableness of the restrictions placed on Fundamental Rights? 3. Microwaves are electromagnetic waves with ... 19. Where is Over 90% of the world's biomass? 20. Who deciphered the Brahmi script?
Last Answer : Answer : 1. 5000 2. Courts 3. Giga hertz 4. Tundra region 5. Kharavela 6. MRF 7. Lillehammer 8. Javan rhino 9. Evergreen forests 10. Prakrit 11. Directive Principle 12. An atom 13. Rs. 100 ... 16. Arati Saha 17. A greater flamingo 18. Finance Bills 19. In tropical rain forests 20. James Princep
Description : Which of the following statements is not true with respect to microwaves? (A) Electromagnetic waves with frequencies from 300 GHz to 400 THz. (B) Propagation is line-of-sight. (C) Very ... waves cannot penetrate walls. (D) Use of certain portions of the band requires permission from authorities.
Last Answer : (A) Electromagnetic waves with frequencies from 300 GHz to 400 THz.
Description : Radio waves, microwaves, infra-red spectrum, ultraviolet rays, X-rays and gamma rays are classified as ______. (1) light waves (2) electromagnetic waves (3) electric waves (4) magnetic waves
Last Answer : (2) electromagnetic waves Explanation: Electromagnetic radiation is the radiant energy released by certain electromagnetic processes. It consists of electromagnetic waves which are synchronized oscillations of electric and magnetic fields that propagate at the speed of light through a vacuum.
Description : What is the frequency range of VHF electromagnetic waves? A) 30-300 kHz B) 30-3000 kHz C) 30-300 MHz D) 30-3000 MHz
Last Answer : What is the frequency range of VHF electromagnetic waves? A) 30-300 kHz B) 30-3000 kHz C) 30-300 MHz D) 30-3000 MHz
Description : ________ are usedfor short-range communications such as those between a PC and aperipheral device. A) Radio waves B) Microwaves C) Infrared waves D) none of the above
Last Answer : Infrared waves
Description : …….are used for short-range communications such as those between a PC and aperipheral device. a. Radio waves b. None of These c. Microwaves d. Infrared waves
Last Answer : d. Infrared waves
Description : To measure the speed of an approaching car a police officer shines – (1) light waves on it (2) microwaves on it (3) radio waves on it (4) ultra high frequency waves on it
Last Answer : (3) radio waves on it Explanation: Radar, which stands for radio detection and ranging, is a system that uses reflected radio waves to detect objects and measure their distance and speed. For example, police use radar to calculate the speed of cars.
Description : Which wave has the highest frequency? w) microwaves x) infrared waves y) ultraviolet waves z) radio waves
Last Answer : ANSWER: Y -- ULTRAVIOLET WAVES
Description : To measure the speed of an approaching car a police officer shines (1) light waves on it (2) microwaves on it (3) radio waves on it (4) ultra high frequency waves on it
Last Answer : radio waves on it
Description : Where is the microwaves radiation located on the electromagnetic spectrum in relation to other kinds of radiation?
Last Answer : Microwaves are in the UHF portion of the spectrum. Typicalfrequencies are above 100 GHz.
Description : Which of the types of electromagnetic radiation has lower energy than microwaves?
Last Answer : Radio.
Description : What are the electromagnetic radiations of wavelengths less than 300 angstroms? A. X-rays B. Ultraviolet rays C. Infrared D. Microwaves
Last Answer : A. X-rays
Description : The working of optical is based on which of electromagnetic waves? -Do You Know?
Last Answer : answer:
Description : Who firstly predicated the existence of electromagnetic waves? -Do You Know?
Description : Consider the following statements: 1. The nuclear forces are short range forces. 2. Alpha rays emitted by a radionuclide are helium nucleus. 3. Gamma rays are electromagnetic waves. 4. Beta rays emitted by a radionuclide are negatively ... 1, 3 and 4 only (c) 1, 2, 3 and 4 (d) 1, 2 and 3 only
Last Answer : Ans:(c)
Description : Ondometer is a - (1) Measuring instrument for distance covered by motor wheels (2) Measuring instrument for frequency of electromagnetic waves (3) Device for measuring sound intensity (4) Measuring instrument for electric power
Last Answer : (2) Measuring instrument for frequency of electromagnetic waves
Description : Before data can be transmitted, they must be transformed to________. A) periodic signals B) electromagnetic signals C) aperiodic signals D) low-frequency sine waves
Last Answer : electromagnetic signals
Description : Which of the following is used in oven? (1) X-rays (2) UV-rays (3) Microwaves (4) Radio waves
Last Answer : (3) Microwaves Explanation: An oven is a thermally insulated chamber used for the heating, baking or drying of a substance and most commonly used for cooking.
Description : Waves that are required for long distance wireless communication are – (1) Infrared rays (2) Ultraviolet rays (3) Radio waves (4) Microwaves
Last Answer : (3) Radio waves Explanation: Wireless communication is the transfer of information between two or more points that are not connected by an electrical conductor. With radio waves distances can be short ... , or as far as thousands or even millions of kilometres for deep-space radio communications.
Description : _____ are used for cellular phone, satellite,and wireless LAN communications. A) Radio waves B) Microwaves C) Infrared waves D) none of the above
Last Answer : Microwaves
Description : ……………are used for cellular phone, satellite, and wireless LAN communications. a. Microwaves b. Radio waves c. None of these d. Infrared waves
Last Answer : a. Microwaves
Description : Microwaves can be focused and reflected in the same way as what other type of waves?
Last Answer : Light waves.
Description : They wrote a paper describing how it was possible to use stimulated emission for amplifying light waves (laser) as well as microwaves (maser). ∙ A. Theodore Maiman ∙ B. KC Kao and GA Bockham ∙ C. Charles Townes and Arthur Schawlow ∙ D. Kapron, Keck and Maurer
Last Answer : C. Charles Townes and Arthur Schawlow
Description : They wrote a paper describing how it was possible to use stimulated emission for amplifying light waves (laser) as well as microwaves (maser).
Last Answer : Charles Townes and Arthur Schawlow
Description : Waves that are required for long distance wireless communication are (1) Infrared rays (2) Ultraviolet rays (3) Radio waves (4) Microwaves
Last Answer : Radio waves
Description : Remote controls use invisible light of frequency just below the visible range. This part of the electromagnetic spectrum is called?
Last Answer : IR Infra red rays We all almost use An IR remote controller to use operate a TV OR DTH OR any other electronics Gadgets in out home but ever you think how this process works means when you ... then a signal corresponding to pressed key will transmit and carrying a command which hit to the IR Receiv
Description : When mechanical waves have a frequency below the audible range, these are called (a) Sonics (b) Infrasonics (c) Ultrasonics (d) Supersonics
Last Answer : Ans:(b)
Description : approximately how fast do electromagnetic waves through space?
Last Answer : 300 million m/s300,000 km/second, equivalent to 300 million meters/second.That speed is known as the "speed of light".
Description : What material absorbs electromagnetic waves best?
Last Answer : That varies A LOT depending on the frequency of the wave. Thereare huge differences in things like absorption, between radiowaves, visible light, gamma rays, etc.
Description : What object emits electromagnetic waves?
Last Answer : Feel Free to Answer
Description : Electromagnetic waves whose photons carry the highest energy also have the:?
Last Answer : Shortest Wavelengths (Apex)
Description : The working of optical is based on which of electromagnetic waves?
Last Answer : – Total internal reflection
Description : What is “Acoustics”: A. Science of Waves B. Science of Sound C. Science of Light D. Science of Electromagnetic Wave System
Last Answer : ANSWER: B
Description : Bats can also fly in dark because they are capable of taking the help of _____ A. Ultraviolet Waves B. Ultrasonic Waves C. Electromagnetic Waves D. Special Retina
Description : Light waves are different from sound waves in that 1. Light waves are electromagnetic but sound waves are not 2. Light waves can travel through water but sound waves cannot 3. Light travels with the same speed in all media 4. Light ... /are correct? (a) 1 and 5 (b) 2 and 3 (c) 3 and 4 (d) 1 and 4
Last Answer : Ans:(a)
Description : Sound waves in air are (a) Transverse (b) Longitudinal (c) Electromagnetic (d) Polarised
Description : Assertion (A) Sound waves are not electromagnetic waves. Reason (R) Sound waves cannot propagate in vacuum.
Description : Energy is not carried by (a) Transverse progressive waves (b) Longitudinal progressive waves (c) Stationary waves (d) Electromagnetic waves
Description : Gamma rays are - (1) High energy electrons (2) Low energy electrons (3) High energy electromagnetic (4) High energy positron waves
Last Answer : (3) High energy electromagnetic Explanation: Gamma rays (γ) refer to electromagnetic radiation of an extremely high frequency and therefore consist of high energy photons.
Description : X- rays are ______ waves. (1) Longitudinal (2) Transverse (3) Electromagnetic (4) Elastic
Last Answer : (3) Electromagnetic Explanation: X-rays are a form of electromagnetic radiation as are radio waves.
Description : In the remote control of television, electromagnetic waves used are – (1) ultraviolet (2) microwave (3) radiowave (4) infrared
Last Answer : (4) infrared Explanation: All electromagnetic waves used are infrared.
Description : Which waves cannot be transmitted through vacuum - (1) Light (2) Heat (3) Sound (4) Electromagnetic
Last Answer : (3) Sound Explanation: Sound waves cannot be transmitted through vacuum. It is transmitted by the movement of particles along with the direction of the motion of the sound wave. More generally, sound is a mechanical disturbance which is dependent upon a medium to travel.
Description : Sound waves in air are ______. (1) transverse (2) longitudinal (3) electromagnetic (4) polarised
Last Answer : (2) longitudinal Explanation: Sound can propagate through compressible media such as air, water and solids as longitudinal waves and also as a transverse wave in solids.
Description : Matter waves are – (1) de Broglie waves (2) Electromagnetic waves (3) Transverse waves (4) Longitudinal waves
Last Answer : (1) de Broglie waves Explanation: In mechanics, matter waves or de Broglie waves reflects the wave-particle duality of matter. The de Broglie relations show that the wavelength is inversely proportional to the momentum of a particle and is also called de Broglie wavelength.
Description : The scientist who first sent electromagnetic waves to distant places is – (1) James Clerk Maxwell (2) Heinrich Hertz (3) Thomas Alva Edison (4) John Logie Baird
Last Answer : (3) Thomas Alva Edison Explanation: Radio is the transmission of single through free space by electromagnetic radiation of a frequency significantly below that of visible light, in the radio frequency range, from about 30 kHz to 300 GHz. Those waves are called radio waves.
Description : These waves cannot be trans-mitted through vacuum – (1) Light (2) Sound (3) Heat (4) Electromagnetic
Last Answer : (2) Sound Explanation: Sound is a mechanical wave that is created by vibrating objects and propagated through a medium from one location to another. Because mechanical waves rely on particle interaction ... space that are void of particles. That is, mechanical waves cannot travel through a vacuum.
Description : Any energy which radiates in the form of radio waves, infrared waves, light waves, x-rays, etc. A. Radiant energy B. Electromagnetic C. Heat D. Ultraviolet
Last Answer : B. Electromagnetic