When a strong beam of light is passed through a colloidal solution, the light will – (1) be scattered (2) pass unchanged (3) be absorbed (4) be reflected

1 Answer

Answer :

(1) be scattered Explanation: When a strong beam of light is passed through a colloidal solution, the light will be scattered.

Related questions

Description : When a strong beam of light is passed through a colloidal solution, the light will (1) be scattered (2) pass unchanged (3) be absorbed (4) be reflected

Last Answer : be scattered

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 : What happens when a beam of light is passed through a colloidal sol?

Last Answer : What happens when a beam of light is passed through a colloidal sol?

Description : What is observed (i) When a beam of light is pressed through a colloidal sol (ii) An electrolyte, NaCl is added to hydrated ferric oxide sol. (iii) Electric current is passed through colloidal sol.

Last Answer : Ans.: (i) Tyndal Effect (iv) Coagulation (v) Electrophoresis

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 : 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 : 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 : What type of colloidal sols are formed in the following ? (i) Sulphur vapours are passed through cold water. (ii) White of an egg is mixed with water. (iii) Concentration of soap solution is increased.

Last Answer : (i) Multimolecular colloid (ii) Macromolecular colloid (iii) Associated colloid.

Description : We can see non luminous object ,when the light a) emitted by the object falls on the eye . b) is reflected from the object towards eye . c) completely passes through the object . d) gets completely absorbed by object .

Last Answer : b) is reflected from the object towards eye .

Description : A beam of light is incident on a perfectly smooth body of water. The angle that the REFLECTED ray makes with the normal is: w) greater than x) smaller than y) the same as the angle the incident ray makes with the normal.

Last Answer : ANSWER: Y -- THE SAME AS

Description : Davisson and Germer scattered electrons from a crystal of nickel. The scattered electrons formed a strong diffraction pattern. What important conclusion was drawn from this experiment?

Last Answer : ANSWER: ELECTRONS ACTED LIKE WAVES

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 a beam of ordinary white light is passed through a Polaroid plate filter, the intensity of the beam that emerges is: w) equal to that of the incident beam x) about 0.9 that of the incident beam y) about one-half that of the incident beam z) practically zero

Last Answer : ANSWER: Y -- ABOUT ONE-HALF THAT OF THE INCIDENT BEAM 

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 : One gram of `Na_(3)AsO_(4)` is boiled with excess of solid `KI` in presence of strong `HCl`. The iodine evolved is absorbed in `KI` solution and titra

Last Answer : One gram of `Na_(3)AsO_(4)` is boiled with excess of solid `KI` in presence of strong `HCl`. The iodine evolved ... B. 38.4 mL C. 24.7 mL D. 30.3 mL

Description : A plane mirror rotating at an angular velocity of 3 radian/s reflects a light beam. The angular velocity of the reflected beam is -

Last Answer : A plane mirror rotating at an angular velocity of 3 radian/s reflects a light beam. The angular velocity of the reflected beam is -

Description : The beam that leaves the target is called, A. The primary X-ray B. The electrons ( from the cathode) C. The secondary rays (scattered radiation) D. X-ray photons no

Last Answer : A. The primary X-ray

Description : A parallel beam, of light of wavelength 100 nm passed through a sample of atomic hydrogen gas in ground state. (a) Assume that when a phton supplies s

Last Answer : A parallel beam, of light of wavelength 100 nm passed through a sample of atomic hydrogen gas ... of radiation that may be detected by the detector.

Description : A liquid is found to scatter a beam of light but leaves no residue when passed through the filter paper. What can the liquid be described as ?

Last Answer : Ans. Colloid. 

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 : An alloy is an example of : (1) Colloidal solution (2) Emulsion (3) Solid solution (4) Heterogeneous mixture

Last Answer : (3) Solid solution Explanation: A Solid solution is a uniform mixture of substances in solid form.

Description : A proton and an alpha particle pass through the gap of a strong magnet. If both particles have the same initial velocity, how many times greater will the defection of the proton be relative to the deflection of the alpha particle? Will it be: w) the same x) 2 times y) 4 times z) 8 times

Last Answer : ANSWER: X -- 2 TIMES

Description : High-frequencywaves are a. absorbed by the F2 layer b. reflected by the D layer c. capable of use for long-distance communications on the moon d. affected by the solar cycle

Last Answer : d. affected by the solar cycle

Description : When electromagnetic waves strike the boundary of denser medium they are __________. A. Reflected, in phase B. Reflected out of phase by 180° C. reflected, they are completely absorbed

Last Answer : B. Reflected out of phase by 180°

Description : Heat waves (A) Cannot pass through vacuum (B) Travel in straight line (C) Can be reflected by a mirror (D) Both (B) and (C)

Last Answer : (D) Both (B) and (C)

Description : A major breakthrough in the studies of cells came with the development of electron microscope. This is because (a) the electron microscope is more powerful than the light microscope as it ... (d) electron beam can pass through thick materials, whereas light microscopy requires thin sections.

Last Answer : (b) the resolving power of the electron microscope is much higher than that of the light microscope

Description : Light scattering takes place in – (1) Colloidal solutions (2) Acidic solutions (3) Electrolyte solutions (4) Basic solutions

Last Answer : (1) Colloidal solutions Explanation: Light scattering in colloidal solutions or particles in suspension is known as Tyndall Effect. It is similar to Rayleigh scattering, in that the intensity of the ... fourth power of the frequency, so blue light is scattered much more strongly than red light.

Description : Light scattering takes place in (1) Colloidal solutions (2) Acidic solutions (3) Electrolyte solutions (4) Basic solutions

Last Answer : Colloidal solutions

Description : When light strikes materialsit passes through thembut it is scattered from its straight parth?

Last Answer : Need answer

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 : If the tendon is placed at an eccentricity e below the centroidal axis of the longitudinal axis of a rectangular beam (sectional modulus Z and stressed load P in tendon) the stress at the extreme top edge (A) Is ... by PZ/e (B) Is increased by Pe/Z (C) Is decreased by Pe/Z (D) Remains unchanged

Last Answer : Answer: Option C

Description : If the load on beam is increased, the tensile stress sin the concrete below the neutral axis will (a) Increase (b) Decrease (c) Remain unchanged (d) None of these

Last Answer : (a) Increase

Description : Light has wavelength, frequency, and speed. Which, if any, of these quantities remains unchanged when light passes from a vacuum into a block of glass?

Last Answer : ANSWER: FREQUENCY

Description : Energy in reflected light : (1) does not depends on the angle of incidence (2) increases with the increase in angle (3) decreases with the increase in angle of incidence (4) becomes maximum for angle of incidence equal to 45°

Last Answer : (2) increases with the increase in angle Explanation: Reflected waves are simply those waves that are neither transmitted nor absorbed, but are reflected from the surface of the medium they encounter. The ... depends on the nature of the surface and the angle at which the wave strikes the surface.

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 : 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 : When a light wave is reflected from a mirror, there is a change in its – (1) frequency (2) amplitude (3) wavelength (4) velocity

Last Answer : (2) amplitude Explanation: When a light wave is reflected from an object, it changes not only its amplitude but also its phase according to the properties of the object at a particular point. The velocity and momentum are just reversed in another direction.

Description : A light ray traveling from glass into air strikes the glass-air surface at an angle 50 degrees to the normal. If the critical angle for the glass-air combination is 42 degrees, the percentage of light reflected from the surface is w) 6 x) 25 y) 38 z) 100

Last Answer : ANSWER: Z -- 100

Description : When light is reflected from a surface, the angle of incidence is: w) 30 degrees x) equal to the angle of reflection y) 90 degrees z) 180 degrees

Last Answer : ANSWER: X -- EQUAL TO THE ANGLE OF REFLECTION

Description : Light is normally incident on a thin soap film and is reflected. If the wavelength of this light is "L" and the index of refraction of the soap film is "N", complete destructive interference will occur for a film thickness of: w) L / 8N x) L / 4N y) L / 2N z) 3L / 4N

Last Answer : ANSWER: Y -- L / 2N 

Description : Assume a ray of light is incident on a smooth reflecting surface at an angle of incidence of 15 degrees to the normal. What is the angle between the incident ray and the reflected ray?

Last Answer : ANSWER: 30 DEGREES

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 : When a light wave is reflected from a mirror, there is a change in its (1) frequency (2) amplitude (3) wavelength (4) velocity

Last Answer : amplitude

Description : Energy in reflected light : (1) does not depends on the angle of incidence (2) increases with the increase in angle (3) decreases with the increase in angle of incidence (4) becomes maximum for angle of incidence equal to 45° 

Last Answer : increases with the increase in angle

Description : . If a single tube pass heat exchanger is converted to two pass, then for the same flow rate, the pressure drop per unit length in tube side will (A) Increase by 1.8 times (B) Decrease by 2 2 (C) Increase by 2 16 (D) Remain unchanged

Last Answer : (C) Increase by 2 16

Description : The quality of teaching is reflected: (A) By the attendance of students in the class (B) By the pass percentage of students (C) By the quality of questions asked by students (D) By the duration of silence maintained in the class 

Last Answer : Answer: C

Description : What are the properties of scattered heat energy ?

Last Answer : 1) Inert medium is not required to conduct radiant heat energy , or even if there is inert medium it does not heat it. 2) The scattered heat energy is carried out at the speed of ... heat energy like Ala reflects the law of refraction. It also causes interference , diffraction and polarization .