Description : The direction of projection for the range of a projectile to be maximum on an inclined plane having angle of inclination 30? to the horizontal, whould be a.45? with horizontal b.30? with vertical c.30? with horizontal d.60? with inclined plane e.45? with inclined plane
Last Answer : b. 30? with vertical
Description : The angle which an inclined surface makes with the horizontal when a body placed on it is on the point moving down is known as a.Angle of friction b.Angle of limiting friction c.Angle of inclination d.Angle of repose e.None of the above
Last Answer : d. Angle of repose
Description : A gun fires shell with a muzzle velocity of 600 m/sec. The angle of inclination of the gun so that the shell hits a target at a distance of 32 km at level 100 m higher than the gun would be approximately? a.60? b.45? c.30? d.15? e.Either of (A) and (C)
Last Answer : e. Either of (A) and (C)
Description : What is the angle of inclination of GPS system? A. 55˚ B. 65˚ C. 105˚ D. 45˚
Last Answer : A. 55
Description : Least force required to draw a body up the inclined plane is W sin (plane inclination + friction angle) applied in the direction (A) Along the plane (B) Horizontally (C) Vertically (D) At an angle equal to the angle of friction to the inclined plane
Last Answer : (D) At an angle equal to the angle of friction to the inclined plane
Description : If a gauge is installed perpendicular to the slope, its measurement is reduced by multiplying (A) Sine of the angle of inclination with vertical (B) Cosine of the angle of inclination with vertical (C) Tangent of the angle of inclination with vertical (D) Calibration coefficient of the gauge
Last Answer : Answer: Option B
Description : divide wall is provided (A) At right angle to the axis of weir (B) Parallel to the axis of weir and upstream of it (C) Parallel to the axis of weir and downstream of it (D) At an inclination to the axis of weir
Last Answer : Answer: Option A
Description : An open vessel of water is accelerated up an inclined plane. The free water surface will (A) Be horizontal (B) Make an angle in direction of inclination of inclined plane (C) Make an angle in opposite direction to inclination of inclined plane (D) Any one of above is possible
Last Answer : Answer: Option C
Description : On a pavement with parabolic camber, the angle of inclination of the vehicles will be (A) More at the crown (B) Less at the edges (C) More at the edges (D) Same at the edges as well as at the crown
Description : What is the angle of incidence ?
Last Answer : The angle that the incident ray produces along the perpendicular is called the incident angle.
Last Answer : : The angle of incidence: - The angle that the incident ray produces immediately is called the angle of incidence.
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 : 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 : A light ray travelling from denser to rarer medium at an angle of incidence more than critical angle of concerned media pair suffers. (1) reflection (2) refraction (3) diffraction (4) total internal reflection
Last Answer : (4) total internal reflection Explanation: If the angle of incidence of light ray in the denser medium is greater than the critical angle of the concerned media pair, the light is not at all reflected in to the rarer medium but is totally reflected. This is known as 'total internal reflection'.
Description : If the angle of incidence formed on a concave mirror at a point is 30° then the angle of reflection will be: (1) 15° (2) 30° (3) 60° (4) 90°
Last Answer : (2) 30° Explanation: The angle between the incident ray and the normal is known as the angle of inci dence. The angle between the reflected ray and the normal is known as the angle of reflection.
Description : At a certain time, the MUF for transmission at an angle of incidence of 75° is 17 MHz. What is the critical frequency? A. 4.4 MHz B. 3.5 MHz C. 6.5 MHz D. 1.5 MHz
Last Answer : A. 4.4 MHz
Description : A radio signal moves from air to glass. The angle of incidence is 20°. Calculate the angle of refraction. The relative permittivity of the glass is 7.8. A. 7.8° B. 5.04° C. 6.04° D. 7.04°
Last Answer : D. 7.04°
Description : Pick out the correct statement. (A) Higher is the temperature of the radiating body, higher is the wavelength of radiation (B) Logarithmic mean area is used for calculating the heat flow rate ... ) Solid angle subtended by the finite surface at the radiating element is called the angle of incidence
Last Answer : (B) Logarithmic mean area is used for calculating the heat flow rate through a thick walled cylinder
Description : What is the condition for total internal reflection? (a) Angle of incidence is less than to critical angle (b) Angle of incidence is equal to critical angle (c) Angle of incidence is greater than to critical angle (d) None of these
Last Answer : (c) Angle of incidence is greater than to critical angle
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 beam of light travels through media of two different densities, if theangle of incidence isgreater than the critical angle, _______ occurs. A) reflection B) refraction C) incidence D) criticism
Last Answer : reflection
Description : The angle of incidence of a wave of a wave with angle of transmission 45 degree and the refractive indices of the two media given by 2 and 1.3 is a) 41.68 b) 61.86 c) 12.23 d) 27.89
Last Answer : a) 41.68
Description : The angle of incidence is equal to the angle of reflection for perfect reflection. State True/False. a) True b) False
Last Answer : a) True
Description : The critical angle is defined as the angle of incidence at which the total internal reflection starts to occur. State True/False. a) True b) False
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 : The Brewster angle is the angle of a) Incidence b) Reflection c) Refraction d) Transmission
Last Answer : a) Incidence
Description : Critical angle of electromagnetic radiation takes place if (A) Angle of incidence is equal to angle of refraction (B) Angle of incidence is greater than the angle of refraction (C) Angle of incidence is equal to 90° (D) Angle of refraction is equal to 90°
Last Answer : Answer: Option D
Description : According to the Snell's law if an electromagnetic wave is incident in a medium (refractive index n1) on another medium (refractive index m2); (A) The angle of incidence is equal to the angle of refraction (B) The angle of ... r) is given by sin i (C) Both (a) and (b) (D) Neither (a) nor (b)
Description : In case of reflection and refraction of electromagnetic radiation, (A) Angle of incidence = angle of refraction (B) Angle of incidence = angle of reflection (C) Angle of refraction = sum of the angles of incidence and refraction (D) All the above
Description : Assuming the wall of a waveguide is perfectly flat, what is the angular relationship between the angle of incidence and the angle of reflection
Last Answer : The angles are equal.
Description : A light ray incident on the optical fiber core is propagated along the fiber. Is the angle of incidence of the light ray entering the fiber larger or smaller than the acceptance angle
Last Answer : Smaller.
Description : In the core, the angle of incidence equals the angle of ____________________
Description : The maximum angle in which external light rays may strike the air/glass interface and still propagate down the fiber. ∙ A. Acceptance cone half-angle ∙ B. Acceptance cone ∙ C. Critical angle ∙ D. Angle of incidence
Last Answer : A. Acceptance cone half-angle
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 : Medium 1 is a glass (n1 = 1.5) and medium 2 is an ethyl alcohol (n2 = 1.36). For an angle of incidence of 30 degrees, determine the angle of refraction. ∙ A. 44.5 degrees ∙ B. 14.56 degrees ∙ C. 33.47 degrees ∙ D. 75 degrees
Last Answer : C. 33.47 degrees
Description : It is the angle formed between the propagating ray and the normal after the ray has entered the second medium. ∙ A. angle of incidence ∙ B. angle of reflection ∙ C. propagation angle ∙ D. angle of refraction
Last Answer : angle of reflection
Description : Angle of incidence is the angle at which A. Total revenue line intersects the total cost line B. Total cost line intersects the variable cost line C. Variable cost line intersects fixed cost line D. Fixed cost line intersects total revenue line
Last Answer : A. Total revenue line intersects the total cost line
Description : The condition for minima in Fraunhofer diffraction for single slit is asinθ = mλWhat is ‘θ’? A. Angle of incidence of incident rays at the slit B. Angle at which diffracted rays strikes the screen C. Angle between slit and screen D. Angle of diffraction at which rays are diffracted at slit
Last Answer : D. Angle of diffraction at which rays are diffracted at slit
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 : Light enters air from water. The angle of refraction will be A. Greater than the angle of incidence. B. Equal to the angle of incidence. C. Less than the angle of incidence. D. None of these
Last Answer : C. Less than the angle of incidence.
Description : The angle of incidence for a wave A. can be measured between the incident ray and the normal B. can be measured between the incident wave front and the boundary C. is equal to the angle of reflection D. all of the above
Last Answer : D. all of the above
Description : If the incident ray falls directly on the normal. What will be the angle of incidence .? a ) 0 b)30 c)60 d)90
Last Answer : a ) 0
Description : Assume that a ray of light passes from glass into air at an angle of incidence greater than zero degrees. Will the ray of light be bent toward or away from the normal as it passes into the air?
Last Answer : ANSWER: AWAY FROM
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 : 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 : Optical fiber uses reflection to guide light through a channel, in which angle of incidence is ................. the critical angle. (A) equal to (B) less than (C) greater than (D) less than or equal to
Last Answer : (C) greater than
Last Answer : total internal reflection
Last Answer : increases with the increase in angle
Description : Which of the following are pertinent to the realization of hydrological cycle? 1. Latitudinal difference in solar heating of the Earth's surface 2. Inclination of the Earth's axis 3. Uneven distribution of land and water 4. Coriolis effect (a) ... (b) 1, 2 & 4 only (c) 2, 3 & 4 only (d) 1, 2, 3 & 4
Last Answer : (b) 1, 2 & 4 only