If the rays are extrapolated backward, they seem to originate from a common point behind the mirror, locating the image. The rays can diverge slightly, and both still get into the eye. Two rays are shown emerging from the same point, striking the mirror, and being reflected into the observer’s eye. The figure above helps illustrate how a flat mirror forms an image. The two rays shown are those that strike the mirror at just the correct angles to be reflected into the eyes of the viewer. Since the movement of the light rays can be shown geometrically, if a mirror is one-half your height, you could see your whole body in the reflection. Many objects, such as people, clothing, leaves, and walls, have rough surfaces and can be seen from all sides.Ī mirror, on the other hand, has a smooth surface (compared with the wavelength of light) and reflects light at specific angles. Diffused light is what allows us to see a sheet of paper from any angle. However, light strikes different parts of a rough surface at different angles, and it is reflected in many different directions (“diffused”). We usually notice reflections off a smooth surface. The only way we can see an object that does not itself emit light is if that object reflects light. ![]() This is when a light ray, the incident ray, hits a reflective material and bounces off as the reflected ray at a specific angle. When light is bounced off of a material, such as a mirror, this is called a reflection. ![]() pin hole camera ( b) simple camera (c) microscope (d) periscopeġ What do you understand by the term lateral inversion?Ģ Two plane mirrors inclining at an unknown angle, forms 11 images.The law of reflection states that the angle of reflection equals the angle of incidence.(a) the same size as the object(b) smaller than the object (c) laterally inverted (d) always virtualĥ In which of the following instrument is the image that is formed erect When an image is formed in a plane mirror, the image formed will be (a) 5 images (b) 6 images (c) 4 images (d) 3 imagesģ When a ray of light is reflected from a plane surface, the angle of incidence is always equal to the angle of ( a) reflection (b) refraction ( c ) diffraction (d) dispersionĤ Which of the following statements is untrue? If an object is placed between the mirrors and viewed from above the mirrors. periscope (b) sextant (c) kaleidoscope (c) binocularsĢ Two plane mirrors are placed touching and at 60 0 to each other.ġ Plane mirrors are used in all these except It land on a level ground at a horizontal distance of 60m from the foot of the tower. Calculate the time it take to fall to the ground? Ģ A body is projected horizontally from the top of a tower with a velocity of 20m/s. An object is released from rest at a height of 25m. ![]() This fact is utilized in mirror galvanometer (to measure very small electric current) and in the navigators sextant. If the direction of an incident ray on a mirror is kept constant and the mirror is rotated through twice that angle. When Ө = O, the two mirrors are parallel to each other and the image of object placed between them will be at infinity.ĮFFECT OF MIRROR ROTATION ON REFLECTED RAY-MIRROR GALVANOMETER When Ө = 180 0, the two mirrors will act as a single mirror and therefore formed only one image. When two mirrors are placed at an angle to each other, the number of images formed is given by:
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