Description : When viewed in white light, why do soap bubbles show colours?
Last Answer : Because of interference
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 : 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 : What causes changes in the colours of the soap or oil films for the given beam of light? (a) Angle of incidence (b) Angle of reflection (c) Thickness of film (d) None of these
Last Answer : Ans:(c)
Description : 15) If Jackson Institutional Furniture Company provides standard primary school chairs in new colours to match the interiors of schools, this modification is most likely to be viewed as a __________ modification. A)style B)functional C)quality D)feature
Last Answer : A)style
Description : What would be the best ratio of water to liquid soap to make bubbles?
Last Answer : Here is a good recipe: * 6 cups water * 1 cup light corn syrup (Huh, an actual good use for this stuff!) * 2 cups Joy dishwashing soap (If using an ultra concentrated dishwashing liquid, use only 1 1/3 cups) Have fun! :D .
Description : I have bubbles, a pipe, and a mouth to drink my soap. What am I? -Riddles
Last Answer : A bath tub!
Description : Why are soap-water bubbles round ?
Last Answer : Soap-water surface tension. It is a kind of gravitational force that pulls water molecules into the smallest possible size. It has been observed that the surface area of a spherical object is the ... the rubber pushes it inwards. The balance of these two pressures keeps him round like a balloon.
Description : How does salt affect soap bubbles?
Last Answer : Need answer
Description : Leakage in a cooking gas cylinder is detected by (A) Radio-isotopes (B) Pouring soap solution on the surface and locating the gas bubbles (C) Halide torch (D) Pungent smell of mercaptans present in the gas
Last Answer : Option D
Description : Light waves projected on oil surface show seven colours due to the phenomenon of (1) polarisation (2) refraction (3) reflection (4) interference
Last Answer : (4) interference Explanation: In physics, interference is a phenomenon in which two waves superpose to form a resultant wave of greater, lower, or the same amplitude.
Description : What are primary colours? (a) Colours of the rainbow (b) Colours in the spectrum of white light (c) Colours which cannot be produced by mixing other colours (d) Colours found in nature
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
Last Answer : Ans:(b)
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 : 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 : The band of seven colours obtained due to the dispersion of white light is called?
Last Answer : Visible Spectrum
Description : What is the phenomenon of splitting white light into seven colours?
Last Answer : Dispersion
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 : 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 : 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 : Which is the most viewed video on YouTube -Do You Know?
Last Answer : "Baby Shark Dance" - Pinkfong Kids' Songs & Stories 7.05 Billion Views "Baby Shark Dance" - Pinkfong Kids' Songs & Stories7.05"Despacito"- Luis Fonsi featuring Daddy Yankee7.04"Shape of You" - Ed Sheeran5.05"See You Again" - Wiz Khalifa featuring Charlie Puth4.79
Description : Why is a water tank appears shallower when it is viewed from top? -Do You Know?
Last Answer : The bending of light (i.e. refraction of light) as it moves from water to air makes the water tank appear to be less shallower than its real depth.
Description : Who is the author of the book colours of the rainbow? -Do You Know?
Last Answer : answer:
Description : What are the little white bubbles filled with red liquid on the branches of my Coral Black japanese maple?
Last Answer : something has laid eggs on the branches...............check dormant oil for the time of year for that tree...........
Description : Why don't my comments show up on a pdf file when viewed on my iPod?
Last Answer : Because you have a “reader” program whereas Adobe Acrobat is a full-fledged document program. They are not compatible.
Description : Algae often float on surface of water during the day but sink down during the night due to (a) Evolution and trapping of oxygen bubbles during the day in their photosynthesis (b) Becoming light as they ... (c) Warming action of sun during the day (d) Release of absorbed air by warming of water
Last Answer : Ans:(a)
Description : Given options show wooden joints, each made of 2 wooden blocks of different colours with a wooden pin at the centre. All joints can be released along the Z axis. Which of the joints can be released along the Y axis?
Last Answer : C
Description : Regarding the National Flag choose the correct options from the following statements i) It has a horizontal strip of three colours including deep saffron at the top, white in the middle, and dark green at the bottom. ii) The ratio of the flag width to its length is 2:3 -Science
Last Answer : Both i and ii The National Flag of India has a horizontal strip of three colours including deep saffron (Kesaria) at the top, white in the middle, and dark green at the bottom. The ratio of the flag width to its length is 2:3.
Description : Equal parts of a flag pole are painted with saffron, white, and green colours. If one-third of the portion painted green is 2 m long, then find the le
Last Answer : Equal parts of a flag pole are painted with saffron, white, and green colours. If one-third of the ... 2 m long, then find the length of the pole
Description : What are the primary colours? (a) Blue, green, yellow (b) Yellow, red, blue (c) Red, blue, green (d) Green, white, black
Description : An object which absorbs all colours and reflects none appears: (1) White (2) Grey (3) Blue (4) Black
Last Answer : (4) Black Explanation: A surface that absorbs all colours, reflecting none, is said to be black. Black is not a colour; it absorbs all the colours of the visible spectrum and reflects none of them to the eyes. White is a colour.
Description : Soaps come in different colours. But why is soap's lather always white in colour?
Last Answer : Lather or foam is nothing but a large collection of small soap bubbles. A soap bubble is , in turn, a very thin film of soap solution enclosing some air. Because of the low surface tension of ... collection of bubbles gets scattered. That is the reason why all kinds of lather or foam appear white.
Description : A box contains 4 green, 5 red and 6 white balls. Three balls are drawn randomly. What is the probability that the balls drawn are of different colours? a) 24/91 b) 67/91 c) 21/91 d) 70/91 e) 3/13
Last Answer : Answer is: a)
Description : All the six faces of a cube of a cube are coloured with six different colours - black, brown, green, red, white and blue. 1. Red face is opposite to the black face. 2. Green face is between red and black ... face is in the bottom. Which face is opposite to green ? (a)Red (b)white (c) blue (d)brown
Last Answer : (c) blue
Description : All the six faces of a cube of a cube are coloured with six different colours - black, brown, green, red, white and blue. 1. Red face is opposite to the black face. 2. Green face is between red and black faces ... , brown, red (b) Blue, black, red, white (c) Red, black, blue, white (d) None of these
Last Answer : (a) Black, white, brown, red
Description : The sequence of marker colours when flying an ILS approach is: a. White, blue, amber b. Blue, white, amber c. Blue, amber, white d. Amber, blue, white
Last Answer : c. Blue, amber, white
Description : An object which absorbs all colours and reflects none appears: (1) white (2) grey (3) blue (4) black
Last Answer : black
Description : A star is 5.5 light years away from the Earth. How much parallax in arcsec will it subtend when viewed from two opposite points
Last Answer : A star is 5.5 light years away from the Earth. How much parallax in arcsec will it subtend ... from two opposite points along the orbit of the Earth?
Description : A water tank appears shallower when it is viewed from top due to – (1) rectilinear propagation of light (2) reflection (3) total internal reflection (4) refraction
Last Answer : (4) refraction Explanation: This phenomenon is because of refraction of light. The lines of sight intersect at a higher position than where the actual rays originated. This causes the water to appear shallower than it really is.
Last Answer : (4) refraction Explanation: This phenomenon is because of refraction of light. The lines of sight intersect at a higher position than where the actual rays originated. This causes the water to appear ... depth that the water appears to be when viewed from above is known as the apparent depth.
Description : Which property of light best explains the way a straw appears to “break” when placed in a glass of water and viewed from the side? a) Reflection b) Refraction c) Absorption d) Water waves
Last Answer : b) Refraction
Description : When Newton’s rings interference pattern is viewed from above by means of reflected light, the central spot is __________. A. Dark B. Multi colored C. Bright D. None of these
Last Answer : A. Dark
Description : The Doppler Effect predicts that the spectrum of light from a visible body moving AWAY from the Earth will experience a shift in frequency when viewed from Earth. This particular shift is known as the: w) Blue shift x) Neutral shift y) Red shift z) Dirac shift
Last Answer : ANSWER: Y -- RED SHIFT
Description : A water tank appears shallower when it is viewed from top due to (1) rectilinear propagation of light (2) reflection (3) total internal reflection (4) refraction
Last Answer : refraction