Description : By mixing suitable mixture of primary colours gives?
Last Answer : Secondary colours
Description : How many colours do you see in a rainbow?
Last Answer : 8
Description : I can be all colours of the rainbow, Or have no colour at all. Sometimes I'm empty, Sometimes I'm full. What am I? -Riddles
Last Answer : Glass.
Description : Who is the author of the book colours of the rainbow? -Do You Know?
Last Answer : answer:
Description : Use the correct word from the options given below to complete the sentence- ―He needed something more than _______, ink and paper to answer the letter.‖ (a) Patience (b) Goodwill (c) A dash of hope (d) A rainbow of colours
Last Answer : (b) Goodwill
Description : When a CD (Compact Disc used in audio and Video system) is seen in sunlight, rainbow like colours are seen. This can be explained on the basis of phenomenon of 1) reflection and diffraction 2) reflection and transmission 3) diffraction and transmission 4) refraction, diffraction and transmission
Last Answer : 4) refraction, diffraction and transmission
Description : Sodium vapour lamps glow with yellow colour. This is due to - (1) sublimation of sodium to emit yellow colour (2) the emission of excess energy absorbed by sodium atoms, in the yellow region of the ... (3) the low ionisation energy of sodium (4) its ability to absorb all other colours except yellow
Last Answer : (2) the emission of excess energy absorbed by sodium atoms, in the yellow region of the spectrum Explanation: Sodium Vapour Lamps glow with yellow colour due to the emission of excess energy absorbed by sodium atoms, in the yellow region of the spectrum.
Description : Sodium vapour lamps glow with yellow colour. This is due to (1) sublimation of sodium to emit yellow colour (2) the emission of excess energy absorbed by sodium atoms, in the yellow region of the ... (3) the low ionisation energy of sodium (4) its ability to absorb all other colours except yellow
Last Answer : the emission of excess energy absorbed by sodium atoms, in the yellow region of the spectrum
Description : Angular separation between two colours of the spectrum depends upon which thing? -General Knowledge
Last Answer : The answer is 'Angle of deviation'
Description : Angular separation between two colours of the spectrum depends upon which thing?
Last Answer : Angle of deviation
Description : 1. What is Study of growth and development of embryo? 2. What is the minimum permissible age for employment in any factory or mine? 3. Angular separation between two colours of the spectrum depends ... exporting iron ore to Japan? 20. Which site, where Ashokan pillars exist, has the bull capital?
Last Answer : Answer : 1. Embryology 2. 14 years 3. Angle of deviation 4. Aravallis 5. Neolithic Age 6. Vienna 7. Arundhati Roy 8. Sphygmology 9. The Great Himalayan Range 10. Second and seventh 11. ... First 14. Rajasthan 15. Mahavira 16. Thomas Paine 17. Soyabean 18. President 19. Paradeep 20. Rampurva
Description : What are the primary colours? (a) Blue, green, yellow (b) Yellow, red, blue (c) Red, blue, green (d) Green, white, black
Last Answer : Ans:(b)
Description : Which of the following colors is not found in the visible light wave spectrum? ∙ a. Red ∙ b. White ∙ c. Orange ∙ d. Yellow
Last Answer : b. White
Description : Why the primary colours of paints are different from the primary colours of light?
Last Answer : Because color in terms of wave-length is an additive phenomenon, and tint, in terms of pigment is a subtractive phenomenon.
Description : Why does a rainbow appear when white light shines into a prism?
Last Answer : Need answer
Description : The photoelectric effect is a demonstration of: w) the wave nature of light x) the particle nature of light y) Compton scattering z) the continuous spectrum of radiation
Last Answer : ANSWER: X -- THE PARTICLE NATURE OF LIGHT
Description : When white light passes through a glass prism, it gets dispersed into colours because (a) glass imparts colours to the light (b) different colours have different speeds in glass (c) interference of light occurs (d) diffraction of light occurs
Description : The band of seven colours obtained due to the dispersion of white light is called?
Last Answer : Visible Spectrum
Description : which of the following statements is not true for scattering of light? (a) Colour of the scattered tight depends on the size of particles of the atmosphere. (b) Red light is least scattered in the ... air scatter the blue, light more strongly than red. So the scattered blue light enters our eyes.
Last Answer : (c) Scattering of light Lakes place as various colours of white light travel with different speed in fir.
Description : When white light is passed through a prism, it splits into ----- colours. A. 5 B. 6 C. 7 (Answer) D. 8
Last Answer : C. 7 (Answer)
Description : The image shows the dispersion of the white light in the prism. What will be the colours of the X, Y and Z? (a) X: red; Y: green; Z: violet (b) X: violet; Y: green; Z: red (c) X: green; Y: violet; Z: red (d) X: red; Y: violet; Z: green
Last Answer : (b) X: violet; Y: green; Z: red
Description : When viewed in white light, why do soap bubbles show colours? -Do You Know?
Last Answer : When viewed in white light, a soap bubble shows colours because of. Due to interference, when soap bubble is viewed in white light it shows colours.
Description : The sky appears blue because – (1) All colours interfere to produce blue (2) In white light, the blue component dominates (3) The atmosphere scatters blue colour more than the others (4) It is actually blue
Last Answer : (3) The atmosphere scatters blue colour more than the others Explanation: Diffuse sky radiation is solar radiation reaching the Earth's surface after having been scattered from the direct solar beam by ... the atmosphere (approximately 25% of the incident radiation when the sun is high in the Sky.
Description : A ray of white light strikes the surface of an object. If all the colours are reflected, the surface would appear (1) Black (2) White (3) Grey (4) Opaque
Last Answer : (2) White Explanation: Objects do not have any colour of their own. When light hits a surface, some of it is absorbed and some of it is reflected. The light that is reflected is ... appear white when they reflect all the wavelengths; they appear black when they absorb all visible wavelengths.
Description : A soap bubble shows colours when illuminated with white light. This is due to – (1) Diffraction (2) Polarization (3) Interference (4) Reflection
Last Answer : (3) Interference Explanation: The iridescent colours of soap bubbles are caused by interfering of (internally and externally) reflected light waves and are determined by the thickness of the film. This phenomenon ... are the same as the phenomenon causing the colours in an oil slick on a wet road.
Description : Which of the following is used to split white light into different colours? (1) Glass slab (2) Convex lens (3) Concave lens (4) Prism
Last Answer : (4) Prism Explanation: In optics, a prism is a transparent optical element with flat, polished surfaces that refract light. At least two of the flat surfaces must have an angle between them. The ... a triangular base and rectangular sides, and in colloquial use "prism" usually refers to this type.
Description : What is the phenomenon of splitting white light into seven colours?
Last Answer : Dispersion
Description : When viewed in white light, why do soap bubbles show colours?
Last Answer : Because of interference
Description : Pick up the correct statement from the following: (A) The refractive index of a medium varies according to the wavelength of the radiation, (B) The variation of the refractive index with wave length, ... of white light by passing through a prism is caused due to dispersion (D) All of these
Last Answer : Answer: Option D
Description : The white light after falling on prism gets split into seven colours due to _______ of light. a) reflection b)refraction c)dispersion d)bend
Last Answer : c)dispersion
Description : The sky appears blue because (1) all colours interfere to produce blue (2) in white light, the blue component dominates (3) the atmosphere scatters blue colour more than the others (4) it is actually blue
Last Answer : the atmosphere scatters blue colour more than the others
Description : A soap bubble shows colours when illuminated with white light. This is due to (1) Diffraction (2) Polarisation (3) Interference (4) Reflection
Last Answer : Interference
Description : Which of the following is used to split white light into different colours ? (1) Glass slab (2) Convex lens (3) Concave lens (4) Prism
Last Answer : Prism
Description : When white light passes through a glass prism we get a spectrum on the other side of the prism. In the emergent beam the ray which is deviated least is - (1) the violet ray (2) the red ray (3) the green ray (4) the blue ray
Last Answer : (2) the red ray Explanation: Red is deviated the least and violet the most.
Description : In a certain spectrum produced by a glass prism of dispersive power `0.0305,` it is found that the refractive index for the red ray is `1.645.`and tha
Last Answer : In a certain spectrum produced by a glass prism of dispersive power `0.0305,` it is found that ... . What is the refractive index for the yellow ray?
Description : A rainbow is produced when sunlight falls on drops of rain. Which of the following physical phenomena is responsible for this? 1. Diffusion 2. Refraction 3. Internal reflection (a) 1, 2 and 3 (b) 1 and 2 (c) 2 and 3 (d) 1 and 3
Last Answer : Ans:(c)
Description : Rainbow is produced in the sky after rainfall and sunlight.
Last Answer : Ans: After rain, many droplet of water travel in the atmosphere. When sun rays fall on these droplets, dispersion of water occurs and droplets act as prism and produce a spectrum of seven colours. That’s why a rainbow is seen in the sky after rain.
Description : The sun appears red at sunrise and sunset while it appears white at noon, because A. Of refraction B. It is cooler at sunrise and at sunset C. Of diffraction leading to red end of the spectrum reaching the earth. D. Of Scattering of light due to dust particles and air molecules?
Last Answer : C. Of diffraction leading to red end of the spectrum reaching the earth.
Description : The sun appears red at sunrise and sunset while it appears white at noon because of _____ A. Refraction B. It is cooler at sunrise and at sunset C. Diffraction leading to red end of the spectrum reaching the earth D. Scattering of light due to dust particles and air molecules
Last Answer : ANSWER: D
Description : A beam of white light is passed through a diffraction grating and the resulting spectrum is allowed to fall on a screen. Which one of the following is the color of light that undergoes the greatest deviation from its original direction? Is it: A. Red B. yellow C. Blue D. violet Engineering
Last Answer : A. Red
Description : A beam of white light is passed through a diffraction grating and the resulting spectrum is allowed to fall on a screen. Which one of the following is the color of light that undergoes the greatest deviation from its original direction. Is it: w) red x) yellow y) blue z) violet
Last Answer : ANSWER: W -- RED
Description : When white light is passed through a double slit which of the following statements is TRUE: w) Each of the bright bands is dispersed into a spectrum x) Only the central band is dispersed into ... one are dispersed into a spectrum z) Each band has a single color different from its neighboring bands
Last Answer : ANSWER: Y -- ALL THE BRIGHT BANDS EXCEPT THE CENTRAL ONE ARE DISPERSED INTO THE SPECTRUM
Description : In the following list of colours 1. Blue 2. Green 3. Red 4. Yellow Which are the three primary colours? (a) 1, 2 and 3 (b) 1, 2 and 4 (c) 2, 3 and 4 (d) 1, 3 and 4
Last Answer : Ans:(a)
Description : Primary colours used in colour television are?
Last Answer : Red; Green; Blue
Description : Primary colours are?
Description : Pick out the wrong statement. (A) 'Green acid' is the other name of phosphoric acid produced by the reaction of phosphate rock & sulphuric acid (B) Chemically unreactive nature of ... in the manufacture of safety matches, is converted into white phosphorous by vaporisation followed by condensation
Last Answer : (C) Red phosphorous is the most reactive allotropic form of phosphorous
Description : 16. Which two primary colours could you mix together to make purple when painting? -Music and Art
Last Answer : 16. Red and blue