Description : Refracting telescopes, if uncorrected, suffer from chromatic aberration. Chromatic aberration occurs because: w) red light is focused more strongly than blue light x) blue light is focused more strongly than ... central rays, z) the central light rays are focused more strongly than the outer rays.
Last Answer : ANSWER: X -- BLUE LIGHT IS FOCUSED MORE STRONGLY THAN RED LIGHT
Description : To what does the atmosphere's "greenhouse effect" refer to? w) the fact that ozone reflects ultraviolet radiation x) the fact that air prevents heat from leaving the earth y) the fact that clouds prevent sunlight from reaching the earth z) the fact that green plants use sunlight to produce food
Last Answer : ANSWER: X -- THE FACT THAT AIR PREVENTS HEAT FROM LEAVING THE EARTH
Description : The tanning rays of the sun are called: w) infrared rays x) visible light y) ultraviolet rays z) gamma rays
Last Answer : ANSWER: Y -- ULTRAVIOLET RAYS
Description : A color television set employs a 25,000 volt electron accelerator to produce the picture and potentially harmful radiation which must be shielded against. The main component of this radiation consists ... which penetrate the picture tube x) soft x-rays y) microwaves z) ultraviolet radiation
Last Answer : ANSWER: X -- SOFT X-RAYS
Description : Cloud droplets unite most easily to form raindrops in clouds containing which of the following substances? w) ozone x) plant pollen y) carbon tetrachloride z) large salt crystals
Last Answer : ANSWER: Z -- LARGE SALT CRYSTALS
Description : Cirrus clouds are: w) rain clouds x) thick and fleecy y) made of ice crystals z) low cloud layers
Last Answer : ANSWER: Y -- MADE OF ICE CRYSTALS
Description : The term "laminar flow" is most often associated with the description of: w) conduction of sound by waves x) current flow in transistors y) effects of viscosity of liquids z) passage of light rays through a liquid
Last Answer : ANSWER: Y -- EFFECTS OF VISCOSITY OF LIQUIDS
Description : Weather satellites transmit cloud cover and temperature-humidity profiles back to Earth using images of which combination of the electromagnetic radiation types? w) infra-red and visible light x) ultraviolet and nuclear magnetic y) ultraviolet and infra-red z) ultraviolet and visible light
Last Answer : ANSWER: W -- INFRA-RED AND VISIBLE LIGHT
Description : A solar cell does NOT respond to red light, but DOES respond to green light. The solar cell will be able to respond to: w) microwaves x) infra-red light y) ultraviolet light z) all of the above
Last Answer : ANSWER: Y -- ULTRAVIOLET LIGHT
Description : A zinc plate is attached to the knob of a negatively charged electroscope. What will happen to the leaves of the electroscope when ultraviolet light is shown on the zinc plate. Will the leaves: w) collapse at once x) gradually come together y) gradually spread further apart z) remain unaffected
Last Answer : ANSWER: X -- GRADUALLY COME TOGETHER
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 : Of the following, the most energetic form of NON-IONIZING radiation is: w) ultra-violet light x) infra-red light y) radar z) microwaves
Last Answer : ANSWER: W -- ULTRA-VIOLET LIGHT
Description : Which of the following waves can penetrate through clouds? ultrasonic gamma radar visible and infrared
Last Answer : radar
Description : Which waves can penetrate through clouds A. ultrasonic B.gamma C.radar D.visible and infrared
Last Answer : C.radar
Description : Green house effect is the heating up of the Earth's atmosphere which is due to – (1) the ultraviolet rays (2) y-rays (3) the infra-red rays (4) X-rays
Last Answer : (3) the infra-red rays Explanation: The greenhouse effect refers to circumstances where the short wavelengths of visible light from the sun pass through a transparent medium and are absorbed, ... The trapping of the long wavelength radiation leads to more heating and a higher resultant temperature.
Description : Infrared rays are absorbed best by which one of the following. Is it: w) bodies of air x) white bodies with rough surfaces y) mirrors z) black bodies with rough surfaces
Last Answer : ANSWER: Z -- BLACK BODIES WITH ROUGH SURFACES
Description : Which of the following does NOT travel in a vacuum? w) radio waves x) gamma rays y) magnetic waves z) sound waves
Last Answer : ANSWER: Z -- SOUND WAVES
Description : In radioactive decay, the emission of an electron is characteristic of: w) Alpha decay x) Beta decay y) Gamma decay z) X-rays
Last Answer : ANSWER: X -- BETA DECAY
Description : Two light rays will interfere constructively with maximum amplitude if the path difference between them is: w) one wavelength x) one-half wavelength y) one-quarter wavelength z) one-eighth wavelength
Last Answer : ANSWER: W -- ONE WAVELENGTH
Description : The internal structure of crystals was first studied with which of the following? w) x-rays x) isotopes y) electron microscopes z) lasers
Last Answer : ANSWER: W -- X-RAYS
Description : Gamma rays are similar to X rays in which of the following ways? w) they have neither rest mass nor charge x) they can be bent in an electric field y) they originate within the nucleus z) they are of low energy
Last Answer : ANSWER: W -- HAVE NEITHER REST MASS NOR CHARGE
Description : Which of the following scientists first determined the atomic number of an atom by use of X-rays? Is it: w) Millikan x) Planck y) Thompson z) Moseley
Last Answer : ANSWER: Z -- MOSELEY
Description : It is believed that carbon-14 in nature is slowly generated by the action of: w) protons on carbon-12 x) electrons on hydrogen y) cosmic rays on boron z) neutrons on nitrogen
Last Answer : ANSWER: Z -- NEUTRONS ON NITROGEN
Description : Alpha rays are different from beta rays in one of the following ways. Are they different since: w) alpha rays are deflected in a magnetic field and beta rays are not x) alpha rays are ... negative charge z) alpha rays are produced within the nucleus and beta rays are produced outside the nucleus
Last Answer : ANSWER: Y -- ALPHA RAYS HAVE A POSITIVE CHARGE AND BETA RAYS HAVE A NEGATIVE CHARGE
Description : What form of radiation most closely resembles X-rays? w) alpha x) beta y) gamma z) neutron
Last Answer : ANSWER: Y -- GAMMA
Description : Radar is used for (a) Detecting objects by using light waves (b) Reflecting sound waves to detect objects (c) Determining the presence and location of objects with radio waves (d) Tracking rain-bearing clouds
Last Answer : Ans:(b)
Description : What is known as venus’s flower? -Do You Know?
Last Answer : answer:
Description : Radar transmits short pulses of high frequency called A. Infrared waves B. Radio waves C. Ultraviolet waves D. Sound waves
Last Answer : ANSWER: B
Description : Conversion of a procarcinogen into a carcinogen often requires (A) Proteolysis (B) Microsomal hydroxylation (C) Exposure to ultraviolet radiation (D) Exposure to X-rays
Last Answer : Answer : B
Description : The waves used for sending signals to the satellite from ground station are _____. A. Ultraviolet rays B. X-rays C. Sound waves D. Micro waves
Last Answer : ANSWER: D
Description : Ozone protects biosphere from – (1) X-rays (2) Gamma rays (3) Ultraviolet rays (4) Infrared rays
Last Answer : (3) Ultraviolet rays Explanation: Ozone is an allotrope of oxygen that is formed from dioxygen by the action of ultraviolet light and also atmospheric electrical discharges. The ozone layer in ... radiation (UVR) from the sun, protecting life on Earth from its potentially harmful effects.
Description : Growth of the baby in the uterus is found using - (1) X-rays (2) Gamma rays (3) Ultra sound (4) Ultraviolet rays
Last Answer : (3) Ultra sound Explanation: Ultrasound is a technique that uses sound waves to show a picture of a baby (fetus) in the uterus. It works by bouncing sound waves off the developing fetus. Echoes ... moving or still picture, called 43$ a sonogram, on a screen. The technique is also called sonography.
Description : Ozone saves the biosphere by absorbing high energy radiations called - (1) Infra-red (2) Gamma rays (3) Ultraviolet rays (UV) (4) X-rays
Last Answer : (3) Ultraviolet rays (UV) Explanation: The ozone layer or ozone shield is a region of Earth's stratosphere that absorbs most of the Sun's ultraviolet (UV) radiation. It absorbs 97 to 99 ... 200 nm to 315 nm wavelength), which otherwise would potentially damage exposed life forms near the surface.
Description : X-rays region lies between – (1) Ultraviolet and visible region (2) Visible and infra-red region (3) Gamma-rays and ultraviolet region (4) Short radio waves and long radio waves
Last Answer : (3) Gamma-rays and ultraviolet region Explanation: X-rays region lies between Gamma rays and ultra-violet region.
Description : Every hot object emits – (1) X-rays (2) Visible light (3) Infrared rays (4) Ultraviolet rays
Last Answer : (3) Infrared rays
Description : Light Emitting Diodes (LED) is used in fancy electronic devices such as toys emit (1) X-rays (2) ultraviolet light (3) (4) All of the above (4) radio waves
Last Answer : (4) All of the above Explanation: A light-emitting diode (LED) is a semiconductor light source that emits light when current flows through it. Infrared LEDs are used in remote-control circuits, such as those used with a wide variety of consumer electronics.
Description : The radiation initially produced in fluorescent tube is – (1) infrared (2) ultraviolet (3) microwaves (4) X-rays
Last Answer : (2) ultraviolet Explanation: The primary radiation that is initially produced within a fluorescent lamp is analogous to that emitted by a low pressure mercury lamp. Fluorescent lamps produce UV radiation by ... coating on the inside of the tubes absorbs the UV and converts it to visible light.
Description : Energy of Ultraviolet rays is great than (1) Infra-red rays (2) Gamma rays (3) X-rays (4) Cosmic rays
Last Answer : (1) Infra-red rays Explanation: The electromagnetic spectrum is the name we use when we talk about different types of radiation as a group. The parts of the electromagnetic spectmm, arranged from highest energy ... mass that move in a wave pattern, all at the same speed - the speed of light.
Description : In the absence of ozone layer, Which rays will enter into atmosphere? (1) Infrared (2) Visible (3) Ultraviolet (4) X-rays
Last Answer : (3) Ultraviolet Explanation: The ozone layer is a layer in Earth's atmosphere containing relatively high concentrations of ozone (O3). The ozone layer absorbs 97-99% of the Sun's medium-frequency ... (from about 200 nm to 315 nm wavelength), which potentially damages exposed life forms on Earth.
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 : Which of the following is not part of the optical spectrum? a. Infrafed b. Ultraviolet c. Visible color d. X-rays
Last Answer : d. X-rays
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
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