Description : 7. Redraw the given diagram and show the path of the refracted ray: [All India(C)] -Chemistry-10
Last Answer : Answer. hope this helps you
Description : The interference in thin films is because (a) The film reflects some light (b) The film is thin enough so that refracted ray is close to reflected ray (c) The reflected ray undergo path change of λ/2 (d) All of above
Last Answer : (d) All of above
Description : A convex lens has a focal length of 10 cm. At what distance from the lens should the object be placed so that it forms a real and inverted image 20 cm away from the lens? What would be the size of ... ? With the help of a ray diagram show the formation of the image by the lens in this case. -Physics
Last Answer : This is the Answe:
Description : An object 2 cm high is placed at a distance of 64 cm from a white screen. On placing a convex lens at a distance of 32 cm from the object it is found that a distinct image of the object ... diagram to show the formation of the image in this position of the object with respect to the lens. -Physics
Last Answer : Since, object-screen distance is double of object-lens separation, the object is at a distance of 2f from the lens and the image should be of the same size of the object.
Description : Draw the ray diagram in each case to show the position and nature of the image formed when the object is placed: (i) at the centre of curvature of a concave mirror (ii) between the pole P and focus F of ... front of a convex mirror (iv) at 2F of a convex lens (v) in front of a concave lens -Physics
Last Answer : Answer. Nature of image: Real, inverted and same size image is formed at the centre of curvature. Nature of image: Virtual, enlarged and erect image is formed behind the mirror. Nature of image: Virtual ... : Virtual, erect and diminished image is formed between O and F on the same side of object.
Description : As shown in Fig. `PQ` is a ray incident on prism `ABC`. Show the corresponding refracted and emergent rays. The critical angle for the material of the
Last Answer : As shown in Fig. `PQ` is a ray incident on prism `ABC`. Show the corresponding refracted and ... is refractive index of the material of prism ? .
Description : Find the maximum angle of refraction when a light ray is refracted from glass `(mu= 1.50)` to air.
Last Answer : Find the maximum angle of refraction when a light ray is refracted from glass `(mu= 1.50)` to air.
Description : The minimum angle of incidence at which the light ray may strike the interface of two media and result in an angle of refraction of 90 degrees or greater. ∙ A. optimum angle ∙ B. angle of refraction ∙ C. refracted angle ∙ D. critical angle
Last Answer : D. critical angle
Description : It is the angle at which the propagating ray strikes the interface with respect to the normal. ∙ A. refracted angle ∙ B. incident angle ∙ C. reflected angle ∙ D. critical angle
Last Answer : incident angle
Description : 11. A concave lens of focal length 15 cm forms an image 10 cm from the lens. How far is the object placed from the lens? Draw the ray diagram. -Physics-10
Last Answer : Focal length of concave lens (OF1), f = – 15 cm Image distance, v= – 10 cm According to the lens formula, The negative value of u indicates that the object is placed 30 cm in front of the lens. This is shown in the following ray diagram.
Description : 10. An object 5 cm in length is held 25 cm away from a converging lens of focal length 10 cm. Draw the ray diagram and find the position, size and the nature of the image formed. -Physics-10
Last Answer : Height of the Object, h0 = 5 cm Distance of the object from converging lens, u = -25 cm Focal length of a converging lens, f = 10 cm Using lens formula, Thus, the image is inverted and formed at a distance of 16.7 cm behind the lens and measures 3.3 cm. The ray diagram is shown below.
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 : To change the position of a circle or ellipse we translate a.Center coordinates b.Center coordinates and redraw the figure in new location c.Outline coordinates d.All of the mentioned
Last Answer : b.Center coordinates and redraw the figure in new location
Description : What is the total resistance of the circuit shown in figure 3- 59? (Hint: Redraw the circuit to simplify and then use equivalent resistances to compute for RT.)
Last Answer : 4Ω
Description : If a light ray IM is incident on the surface AB as shown, identify the correct emergent ray. light-reflection-and-refraction-chapter-wise-important-questions-class-10-science-8 -Physics
Last Answer : Ray NQ, as it has to be parallel to ray OS.
Description : A car is moving in a straight path. What is the motion of the car? -Physics
Last Answer : Rectilinear motion or straight line motion
Description : Winch of the following is not true about X-rays? (1) have low penetrating power (2) travel with the speed of light (3) Can be reflected or refracted (4) can affect photographic plates
Last Answer : (1) have low penetrating power Explanation: X-rays and gamma rays are photons, i.e. high-energy light-waves. When emitted by a source, for example, radium or cobalt, located outside the body, they ... they can be used in diagnostic medicine to image human bones or human organs made opaque by a dye.
Description : The colour of the ocean appears to be blue because the sunlight falling on it is – (1) reflected (2) refracted (3) diffracted (4) scattered
Last Answer : (4) scattered Explanation: The reason the ocean is blue is due to the absorption and scattering of light. The blue wavelengths of light are scattered, similar to the scattering of blue light in the sky ... the red and weak in the blue, thus red light is absorbed quickly in the ocean leaving blue.
Description : Which of the following is not true about X-rays? (1) have low penetrating power (2) travel with the speed of light (3) Can be reflected or refracted (4) can affect photographic plates
Last Answer : have low penetrating power
Description : The colour of the ocean appears to be blue because the sunlight falling on it is (1) reflected (2) refracted (3) diffracted (4) scattered
Last Answer : scattered
Description : 3. Draw the ray diagram in each case to show the position and nature of the image formed when the object is placed: -Chemistry-10
Last Answer : Answer. Nature of image: Real, inverted and same size image is formed at the centre of curvature. Nature of image: Virtual, enlarged and erect image is formed behind the mirror. Nature of image: ... image: Virtual, erect and diminished image is formed between O and F on the same side of object.
Description : 2. The magnetic field in a given region is uniform. Draw a diagram to represent it. -Physics-10
Last Answer : Solution: hope this is helpul
Description : What are some simple chemistry or physics "tricks" to use in a magic show for children?
Last Answer : levitation using a hidden supercooled magnet.
Description : In the following ray diagram are given the position of an object O, image I and two lenses `L_(1)` and `L_(2)`. The focal length of `L_(1)` is also gi
Last Answer : In the following ray diagram are given the position of an object O, image I and two lenses `L_(1)` ... also given. Find the focal length of `L_(2)`.
Description : What Is concave mirror complete the given ray diagram and also write its one charactertis of the formed image?
Last Answer : Concave mirror is that spherical mirror in which the reflectionof light takes place in the bent-in surface(also called concavesurface).
Description : 1. A ray of light travelling in air enters obliquely into water. Does the light ray bends towards the normal or away from the normal? Why? -Physics-10
Last Answer : The light ray bends towards the normal. When a light ray enters from an optically rarer medium (which has low refractive index) to an optically denser medium (which has a high refractive index), ... denser than air, a ray of light entering from air into water will bend towards the normal.
Description : The colour of the ocean appears blue because the sunlight falling on it is (a) Reflected (b) Refracted (c) Absorbed (d) Scattered
Last Answer : Ans:(d)
Description : The core of an optical fiber has a a. Lower refracted index than air b. Lower refractive index than the cladding c. Higher refractive index than the cladding d. Similar refractive index with the cladding
Last Answer : c. Higher refractive index than the cladding
Description : Which frequency bands can be refracted during the day by the D layer? A. VLF B. MF C. LF D. Both VLF and LF
Last Answer : D. Both VLF and LF
Description : Skip distance can be maximized by using the ____ radiation angle possible and the ____ frequency that will be refracted at that angle. A. lowest, lowest B. lowest, highest C. highest, lowest D. highest, highest
Last Answer : B. lowest, highest
Description : ECE Board Exam March 1996 EIRP stands for _______________. A. effective isotropic refracted power B. effective and ideal radiated power C. effective isotropic reflected power D. effective isotropic radiated power
Last Answer : D. effective isotropic radiated power
Description : The Snell’s law can be derived from which type of incidence? a) Incidence angle b) Reflected angle c) Refracted angle d) Oblique incidence
Last Answer : d) Oblique incidence
Description : Pick up the correct statement from the following: (A) In astronomical telescope, the rays from the object after refraction at the objective are brought to a focus before entering the eyepiece to produce ... the objective traversing through the eyepiece, is called line of sight (D) All the above
Last Answer : (D) All the above
Description : Pick up the correct statement from the following: (A) The minimum frequency of light for which no electrons are emitted, is called threshold frequency (B) Polarising angle of glass is 57.5° (C) At the polarising angle, the reflected and refracted rays are orthogonal (D) All the above
Last Answer : Answer: Option D
Description : A refracted wave occurs when a wave passes from one medium into another medium. What determines the angle of refraction?
Last Answer : The density of the two mediums, and the velocity of the waves.
Description : There is a maximum frequency at which vertically transmitted radio waves can be refracted back to Earth. What is this maximum frequency called?
Last Answer : Critical frequency.
Description : What factor determines whether a radio wave is reflected or refracted by the ionosphere?
Last Answer : Thickness of ionized layer.
Description : A light wave enters a sheet of glass at a perfect right angle to the surface. Is the majority of the wave reflected, refracted, transmitted, or absorbed?
Last Answer : Transmitted.
Description : The term critical angle describes ∙ A. the point at which light is refracted ∙ B. the point at which light becomes invisible ∙ C. the point at which light has gone from the refractive mode ... reflective mode ∙ D. the point at which light has crossed the boundary layers from one index to another
Last Answer : C. the point at which light has gone from the refractive mode to the reflective mode ∙
Description : Which of the following terms best describes the reason that light is refracted at different angles? ∙ A. Photon energy changes with wavelength ∙ B. Light is refracted as a function of surface smoothness ∙ ... determined partly by a and b ∙ D. The angle is determined by the index of the materials
Last Answer : ∙ D. The angle is determined by the index of the materials
Description : The core of an optical fiber has a ∙ a. Lower refracted index than air ∙ b. Lower refractive index than the cladding ∙ c. Higher refractive index than the cladding ∙ d. Similar refractive index with the cladding
Description : The termcritical angle describes a. the point at which light is refracted b. the point at which light becomes invisible c. the point at which light has gone from the refractive mode to the reflective mode d. the point at which light has crossed the boundary layers from one index to another
Last Answer : c. the point at which light has gone from the refractive mode to the reflective mode
Description : Whichofthe followingterms describesthe reason thatlightisrefractedat different angles? a. Photon energy changes with wavelength b. Light is refracted as a function of surface smoothness c. The angle is determined partly by a and b d. The angle is determined by the index of the materials
Last Answer : d. The angle is determined by the index of the materials
Description : When light falls on shiny surface it gets __________ . a) refracted b)reflected c)bent d)nothing happens
Last Answer : b)reflected
Description : A wave with a wavelength of 40 meters and a height of 2 meters will NOT be refracted in water with a depth of more than: w) 1 meter x) 2 meters y) 10 meters z) 20 meters
Last Answer : ANSWER: Z -- 20 METERS
Description : Explain why a ray of light passing through the centre of curvature of concave minor gets reflected along the same path. -Science
Last Answer : The light falling on the centre of curvature is reflected back along the same path because incident ray falls on the mirror along the normal to the reflecting surface.
Description : Why in Newton’s rings the center spot is always dark? A. The thickness of the film is zero at center B. The path difference between incident ray and reflected ray is ½wavelength C. The incident ray and reflected ray undergo destructive interference D. All of above
Last Answer : D. All of above
Description : 147 A ray directed towards the centre of curvature of a spherical mirror a) become parallel to principal axis b)retraces its path c)appears to diverge from focus d)passes through focus.
Last Answer : b)retraces its path
Description : The refractive indices of four media A, B, C and D are given in the following table: light-reflection-and-refraction-chapter-wise-important-questions-class-10-science-9 If light, travels from one medium to another, in which case the change in speed will be (i) minimum, (ii) maximum? -Physics
Last Answer : (i) Minimum change is seen as light moves between 1.50 and 1.52, i.e. B and C. (ii) Maximum change when light moves between 1.33 and 2.40, i.e. A and D.
Description : Before X-ray examination (coloured Xray) of the stomach, patients are given suitable salt of barium because. (1) barium is a good absorber of X-rays and helps stomach to appear clearly (2) barium ... clearly (3) barium allows X-rays to pass through the stomach (4) barium salts are easily available
Last Answer : (1) barium is a good absorber of X-rays and helps stomach to appear clearly