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 : "Tice splitting of different colours of light in a prism is : (1) Reflection of light (2) Dispersion light (3) Diffraction light (4) Refraction of light
Last Answer : (2) Dispersion light Explanation: The refractive index of many materials (such as glass) varies with the wavelength or colour of the light used, a phenomenon known as dispersion. This causes ... a wave depends on its frequency, or alternatively when the group velocity depends on the frequency.
Description : The splitting of different colours of light in a prism is : (1) Reflection of light (2) Disperson of light (3) Diffraction of light (4) Refraction of lights
Last Answer : Disperson of light
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 : 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 : 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 : 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 : A mirage occurs because of – (1) Reflection by hot ground (2) Total internal reflection by layers of air (3) Interference of light (4) Diffraction of light
Last Answer : (2) Total internal reflection by layers of air Explanation: A mirage is a naturally occurring optical phenomenon in which light rays are bent to produce a displaced image of distant objects or the ... -changing mirage. Cold air is denser than warm air and has therefore a greater refractive index.
Description : A mirage occurs because of (1) reflection by hot ground (2) total internal reflection by layers of air (3) interference of light (4) diffraction of light
Last Answer : total internal reflection by layers of air
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 : 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 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 : The refractive indices for lights of violet, yellow and red colours for a flint glass prism are respectively 1.632, 1.620 and 1.613. Find the dispersi
Last Answer : The refractive indices for lights of violet, yellow and red colours for a flint glass prism are ... Find the dispersive power of the prism material.
Description : The deviation caused for red, yellow and violet colours for crown glass prism are `2.84^(@),3.28^(@)` and `3.72^(@)` respectively. The dispersive powe
Last Answer : The deviation caused for red, yellow and violet colours for crown glass prism are `2.84^( ... respectively. The dispersive power of prism material is:
Description : On a rainy day, small oil films on water show brilliant colors'. This is due to A. dispersion B. interference C. diffraction D. Polarization 49.The critical angle for a beam of light ... A. absorbed B. totally reflected C. Partially reflected and partially transmitted D. Totally transmitted
Last Answer : C. Partially reflected and partially transmitted
Description : When a ray of light passes through a prism,
Last Answer : When a ray of light passes through a prism, A. the deviation of red light is maximum. B. the ... blue light is maximum. D. all rays deviate equally.
Description : Diffraction due to circular aperture If a light passes through a small pinhole, and incident on a screen. What will be observed on the screen? A.A sharp bright point of the width equal to ... A bright ring at the centre surrounded by alternate dark and bright rings D. A diffused bright point
Last Answer : C. A bright ring at the centre surrounded by alternate dark and bright rings
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 : Which of the following phenomenon helps to conclude that light is a transverse wave? (1) interference (2) diffraction (3) polarization (4) refraction
Last Answer : (3) polarization Explanation: The phenomena of interference and diffraction of light were successful beyond doubt to prove that light is a form of wave. But they failed to decide whether light ... light is a transverse wave was established only after the discovery of the phenomenon of polarization.
Description : What is the phenomenon which established the transverse nature of light? (1) Reflection (2) Interference (3) Diffraction (4) Polarisation
Last Answer : (4) Polarisation Explanation: The phenomena which proves the transverse nature alight is polarization. Since the intensity of polarized light on passing through a tourmaline crystal changes, ... waves. Transverse waves are waves that are oscillating perpendicularly to the direction of propagation
Description : Which phenomena shows the particle nature of light? (1) Diffraction (2) Interference (3) Photoelectric effect (4) Polarisation
Last Answer : (3) Photoelectric effect Explanation: The phenomena such as interference, diffraction, and polarization can only be explained when light is treated as a wave whereas photoelectric effect, line spectra, and the production and scattering of x rays demonstrate the particle nature of light.
Description : The wavelength of light has no role in a. Diffraction b. Interference c. Polarization d. Reflection
Last Answer : c. Polarization
Description : The wavelength of light has no role in A. Diffraction B. Interference C. Resolving power D. Polarization
Last Answer : D. Polarization
Description : The wavelength of light has no role in ∙ a. Diffraction ∙ b. Interference ∙ c. Polarization ∙ d. Reflection
Description : Newton’s light illustrate the phenomenon of (a) Interference (b) Diffraction (c) Dispersion (d) Polarisation
Last Answer : (a) Interference
Description : Which of the following does not support the wave nature of light A. Interference C. Polarisation B. Compton effect D. Diffraction
Last Answer : B. Compton effec
Description : Diffraction and interference demonstrate which of the following? w) particle nature of light x) wave nature of light y) polarization of light z) refraction of light
Last Answer : ANSWER: X -- WAVE NATURE OF LIGHT
Description : What is the phenomenon which established the transverse nature of light ? (1) Reflection (2) Interference (3) Diffraction (4) Polarisation
Last Answer : Polarisation
Description : Which of the following phenomenon helps to conclude that light is a transverse wave? (1) interference (2) diffraction (3) polarisation (4) refraction
Last Answer : polarisation
Description : A thin oil film on a water surface appears coloured because of – (1) reflection (2) interference (3) diffraction (4) polarization
Last Answer : (2) interference Explanation: A thin oil film on a water surface appears coloured because of thin-film interference which involves the interference of light waves reflecting off the top surface of a film with the waves reflecting from the bottom surface.
Description : Colors in thin films are because of A. Dispersion C. Interference B. Compton effect D. Diffraction
Last Answer : C. Interference
Description : A thin oil film on a water surface appears coloured because of (1) reflection (2) interference (3) diffraction (4) polarization
Last Answer : interference
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 : When white light passes through a red plate of glass and then through a green plate of glass which one of the following things occur? w) the light is totally absorbed x) the light that emerges is ... ) the light that emerges lacks only its red and green components z) the light that emerges is green
Last Answer : ANSWER: W -- THE LIGHT IS TOTALLY ABSORBED
Description : A ray of light incident at `49^(@)` on the face of an equilaternal prism passes symmetrically. Calculate the refractive index of the material of the p
Last Answer : A ray of light incident at `49^(@)` on the face of an equilaternal prism passes symmetrically. ... the refractive index of the material of the prism.
Description : Which of the following imparts a blue colour to glass? (1) Cobalt oxide (2) Copper oxide (3) Iron oxide (4) Nickel oxide
Last Answer : (1) Cobalt oxide Explanation: The addition of oxides, sulfides, salts, and other compounds of different metals to molten glass at the time of manufacture adds colour to glass. The introduction of ... colour; copper oxide: turquoise; chromium: dark green to black; cadmium sulfide: deep yellow, etc.
Description : Which of the following imparts deep blue colour to glass? (1) Cobalt oxide (2) Cupric oxide (3) Ferrous oxide (4) Nickel oxide
Last Answer : (4) Nickel oxide Explanation: Glass colouring and colour marking may be obtained by addition of colouring ions, by precipitation of nanometer sized colloides (so-called striking glasses such as "ruby gold" or red "selenium ruby"), by coloured inclusions (as in milk glass and smoked glass).
Description : Which of the following imparts a blue colour to glass ? (1) Cabalt oxide (2) Copper oxide (3) Iron oxide (4) Nickel oxide
Last Answer : Cabalt oxide
Description : Which of the following imparts deep blue colour to glass ? (1) Cobalt oxide (2) Cupric oxide (3) Ferrous oxide (4) Nickel oxide
Last Answer : Nickel oxide
Description : In the following diagram, the path of a ray of light passing through a glass prism is shown: In this diagram the angle of incidence, the angle of emergence and the angle of deviation respectively are (select the correct option): (a) X, R and T (b) Y, Q and T (c) X, Q and P (d) Y, Q and P
Last Answer : (d) Y, Q and P
Description : When a ray passes through a prism ______. A. It goes undeviated B. It remain parallel to a base C. It bends towards the base D. None
Last Answer : C. It bends towards the base
Description : The refracting angle of a glass prism is `60^(@)`. The value of minium deviation for light passing through the prism is `40^(@)`. Calculate the value
Last Answer : The refracting angle of a glass prism is `60^(@)`. The value of minium deviation for light passing through the ... prism. Given `sin 50^(@) = 0.766`.
Description : Selaginella and Salvinia are considered to represent a significant step toward evolution of seed habit because (a) female gametophyte is free and gets dispersed like seeds (b) female gametophyte ... by seed coat (d) embryo develops in female gametophyte which is retained on parent sporophyte.
Last Answer : (b) female gametophyte lacks archegonia
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 : Pitch (a product of coal tar distillation) is always mixed with creosote oil, when it is to be burnt in a burner, because (A) Its calorific value is very less (B) Tar neutralises the residual acids ... for its transportation through pipelines at economic pressure drop (D) All (A), (B) and (C)
Last Answer : (C) It reduces viscosity and imparts fluidity for its transportation through pipelines at economic pressure drop
Description : Newton's rings are formed because of interference between the light Reflected from (a) Upper surface of Plano-convex lens and lower surface of plane glass plate (b) Lower surface of Plano-convex ... c) Lower and upper surface of Plano-convex (d) Lower and upper surfaces of plane glass plate
Last Answer : (b) Lower surface of Plano-convex lens and upper surface of plane glass plate
Description : The information of brilliant colors in a thin soap film is a consequence of the phenomena of - (1) Polarization and interference (2) Diffraction and dispersion (3) Multiple refraction and dispersion (4) Multiple reflection and interference
Last Answer : (4) Multiple reflection and interference Explanation: Light waves reflected by the upper and lower boundaries of a thin film interfere with one another, either enhancing or reducing the reflected light.