Description : Which series lies in the Ultraviolet region? a) Lyman series b) Paschen series c) Brackett serie d) Balmer series
Last Answer : a) Lyman series
Description : The only series which lies in the visible region of the electromagnetic spectrum is a) Paschen series b) Lyman series c) Balmer series d) Pfund series
Last Answer : b) Lyman series
Description : The region where the Lyman series contains the wavelength 1∕ λ = RH [1/ 12 – 1/ n2 ] is a) visible region b) infrared region c) ultraviolet region d ) none of these
Last Answer : c) ultraviolet region
Description : The first Hydrogen spectral series was identified , in 1885, by a) J.R.Rydberg b) J.J.Balmer c) Theodore Lyman d) F. S. Brackett
Last Answer : b) J.J.Balmer
Description : The radiations emitted by human body lies in a) Infrared region b) Ultraviolet region c) Visible region d) None of the above
Last Answer : a) Infrared region
Description : For the hydrogen atom, which series describes electron transitions to the N = 2 orbit? Is it the: w) Lyman series x) Paschen series y) Balmer series z) Pfund series
Last Answer : ANSWER: Y -- BALMER SERIES
Description : For the hydrogen atom, which series describes electron transitions to the N=1 orbit, the lowest energy electron orbit? Is it the: w) Lyman series x) Balmer series y) Paschen series z) Pfund series
Last Answer : ANSWER: W -- LYMAN SERIES
Description : In which region of electromagnetic spectrum does the Lyman series of hydrogen atom lie? (1) Visible (2) Infrared (3) Ultraviolet (4) X-ray
Last Answer : (3) Ultraviolet
Description : In which region of electromagnetic spectrum does the Lyman series of hydrogen atom lie ? (1) Visible (2) Infrared (3) Ultraviolet (4) X-ray
Last Answer : Ultraviolet
Description : Transition ions absorb light in – (1) infrared region (2) ultraviolet region (3) microwave region (4) visible region
Last Answer : (4) visible region Explanation: Transition metal ions have an incomplete set of 3d electrons. Changes in the energy of these electrons correspond to the energy of visible light. The absorption of visible light by these ions lend colour to gems.
Description : Which region of the electro-magnetic spectrum will cause sunburns? w) ultraviolet x) infrared y) visible
Last Answer : ANSWER: W -- ULTRAVIOLET
Description : Transition ions absorb light in : (1) infrared region (2) ultraviolet region (3) microwave region (4) visible region
Last Answer : visible region
Description : Name the spectral series which appear in the region of electromagnetic spectrum. (a) Visible region (b) UV region (c) Far IR region
Last Answer : Ans: (a) Balmer Series (b) Lymen Series (c) Pfund Series
Description : The results obtained by the Balmer were formulated, in 1896, by a) Theodore Lyman b) F. S. Brackett c) J.R.Rydberg d) J.J.Balmer
Last Answer : c) J.R.Rydberg
Description : Which of the following types radiations is absorbed by the upper layer of the atmosphere? A. Radio-waves B. Infrared C. Visible D. Ultraviolet
Last Answer : ANSWER: B
Description : Which type of radiations are absorbed by the upper layer of the atmosphere? (1) Radio-waves (2) Infrared (3) Visible (4) Ultraviolet
Last Answer : (4) Ultraviolet Explanation: The Troposphere is the layer where the weather happens. Above this layer is the Stratosphere and in between them is the Ozone layer that absorbs the sun's ... . Above the Stratosphere is the Mesosphere, the Thermosphere including the Ionosphere - and the Exosphere.
Description : Every hot object emits – (1) X-rays (2) Visible light (3) Infrared rays (4) Ultraviolet rays
Last Answer : (3) Infrared rays
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 : The band of light wavelengths that are too long to be seen by the human eye a. Amber b. Visible c. Infrared d. Ultraviolet
Last Answer : c. Infrared
Description : Band of light waves, that are too short to be seen by human eye. A. Visible B. Infrared C. Ultraviolet D. Amber
Last Answer : C. Ultraviolet
Description : Select the arrangement of electromagnetic radiation which starts with the lowest energy and increases to greatest energy? A. radio, visible, infrared, ultraviolet, x-ray, gamma ray B. radio, infrared, visible ... -ray, gamma ray D. radio, infrared, visible, ultraviolet, x-ray, gamma ray (Answer)
Last Answer : D. radio, infrared, visible, ultraviolet, x-ray, gamma ray (Answer)
Description : Which of the following has the largest wavelength? A. visible light B. x-rays C. infrared light (Answer) D. ultraviolet radiation
Last Answer : C. infrared light (Answer)
Description : Which of the following is not a part of the optical spectrum? ∙ A. infrared ∙ B. ultraviolet ∙ C. visible color ∙ D. x-rays
Last Answer : ∙ D. x-rays
Description : It is caused by hydroxide ions in the material ∙ A. visible light absorption ∙ B. infrared absorption ∙ C. ultraviolet absorption ∙ D. ion resonance absorption
Last Answer : D. ion resonance absorption
Description : t is a result of photons of light that are absorbed by the atoms of the glass core molecule. ∙ A. ion resonance absorption ∙ B. infrared absorption ∙ C. ultraviolet absorption ∙ D. visible light absorption
Last Answer : B. infrared absorption
Description : It is caused by valence electrons in the silica material from which the fiber are manufactured. ∙ A. ion resonance absorption ∙ B. infrared absorption ∙ C. ultraviolet absorption ∙ D. visible light absorption
Last Answer : ultraviolet absorption
Description : Most fiber optic light sources emit light in which spectrum? ∙ A. visible ∙ B. infrared ∙ C. ultraviolet ∙ D. X-ray
Last Answer : B. infrared
Description : The band of light frequencies that are too low to be seen by the human eye ∙ A. Infrared ∙ B. X-rays ∙ C. Visible ∙ D. Ultraviolet
Description : The band of light frequencies to which human eye will respond ∙ A. Infrared ∙ B. Visible light ∙ C. Ultraviolet ∙ D. Cosmic ray
Last Answer : B. Visible light
Description : The band of light frequencies that are too high to be seen by the human eye. ∙ A. Ultraviolet ∙ B. Visible light ∙ C. Infrared ∙ D. Yellow
Last Answer : ∙ C. Infrared
Description : Most fiber-optic light sources emit light in which spectrum? ∙ a. Visible ∙ b. Infrared ∙ c. Ultraviolet ∙ d. X-ray
Last Answer : ∙ b. Infrared
Description : The band of light wavelengths that are too short to be seen by the human eye ∙ a. Amber ∙ b. Visible ∙ c. Infrared ∙ d. Ultraviolet
Description : The band of light wavelengths that are too long to be seen by the human eye ∙ a. Amber ∙ b. Visible ∙ c. Infrared ∙ d. Ultraviolet
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 : Which type of radiations are absorbed by the upper layer of the atmosphere? (1) Radio-waves (2)Infrared (3) Visible (4) Ultraviolet
Description : Every hot object emits _____ (1) X–rays (2) Visible light (3) Infrared rays (4) Ultraviolet rays
Last Answer : Infrared rays
Description : In the absence of ozone layer, which rays will enter into atmosphere? (1) Infrared (2) Visible (3) Ultraviolet (4) X-rays
Description : Which one of the following frequency regions is a part of sun's radiation? (A) Ultraviolet frequency region (B) Infrared frequency region (C) Radio frequency region (D) All of these
Last Answer : Answer: Option D
Description : The largest wavelength in the ultraviolet region of the hydrogen spectrum is 122 nm. The smallest wavelength in the infrared region of the hydrogen Spectrum (to the nearest integer) is (A) 802nm (B) 823nm (C) 1882 nm (D) 1648 nm
Last Answer : (B) 823nm
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 : 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 : Gamma-rays and ultraviolet region
Description : The most intense line in the Brackett series of the spectrum of atomic hydrogen is the transition :-
Last Answer : The most intense line in the Brackett series of the spectrum of atomic hydrogen is the transition :- A. `n_(2)=ooton_ ... (1)=4` D. `n_(2)=4ton_(1)=3`
Description : Calculate the wavelengths of the member of Lyman, Balmer and Paschen series.
Last Answer : Calculate the wavelengths of the member of Lyman, Balmer and Paschen series.
Description : Pair production can be studied with a) Ultraviolet rays b) X-rays c) Microwaves d) -rays
Last Answer : d) -rays
Description : When the wavelength of a spectral line emitted from an object decreases which end of the visible light spectrum does it move toward and what is the object and motion relative to Earth?
Last Answer : Need answer
Description : Lasers are used to produce a) Intense beam of visible light b) monochromatic beam of visible light c) coherent beam of visible light d) All of them
Last Answer : d) All of them
Description : Pick out the wrong statement. (A) Benzopyrene which causes cancer is present in traces in tobacco, charcoal & petrol driven automobile exhaust (B) NO2 is capable of penetrating the troposphere and ... at all produced during combustion of sulphur bearing fuels as all the sulphur is oxidised to SO2
Last Answer : (D) H2S is not at all produced during combustion of sulphur bearing fuels as all the sulphur is oxidised to SO2
Description : Three bulbs are rating 40W 60W and 100W designed to work on 220V mains. Which bulb will burn most brightly if they are connected in series across 220 V mains? a. 40 W bulb b. 60 W blub c. 100 W blub d. all will burn equally brightly
Last Answer : a. 40 W bulb
Description : Three equal resistors connected in series with a source of e m f together dissipate 10 W of power each. What will be the power dissipated if the same resistors are connected in parallel across the same source of e m f? a. 40 W b. 90W c. 100W d. 120W
Last Answer : b. 90W
Description : The spectral region of the electromagnetic radiation which passes through the atmosphere without much attenuation is known as: (A) Ozone hole (B) Atmospheric window (C) Ozone window (D) Black hole
Last Answer : Answer: Option B