This question pertains to the case when we are standing in bright light, the glass acts as a mirror.
126978
~4% of light is reflected back at normal incidence (standing in front of the mirror).  In order to see the reflected image of yourself, the light that is reflected should be brighter than any light coming through the glass.  If the glass is black, it means that little light passes through it, so it should be fairly easy to see your image.  This is also why it it is easier to see your image in transparent glass if it is brighter in the room on your side of the glass than on the other side.
494846
Mirrors reflect light, not vision, and the movement of light is independent of human involvement.\n\nA test would be to use a mirror to reflect daylight or artificial light from one room into another, darkened room. The light would make objects in the second room visible, without the mirror being observed, and the reflective path could be defined and verified.\n\nThis would not solve the problem of whether any object (including a reflection or a beam of light) exists when it is not seen (a seen photograph of unseen objects only confirms that the illusion of objects can be preserved and shared, as when you leave a room and come back again with a companion).\n\nThis is a philosophical question, rather than a physical one, since all events observed in life are subject to observation by the living observer.
521463
I believe the light bulb would light up the sphere, like a lamp shade, You'd see the light but not the light bulb. The metal particles that are in a one sided mirror allow some light to come through.
654868
It could be a double reflection.  If the image you see is in the correct orientation, than it is a daouble reflection, or reflected any even number of times.  The object is in front of you which reflects off the left window, into the right window, where you are looking.
197830
Lighty is an electromagnetic ray that gives the sensation of sight.Electromagnetic waves are waves that donot need any material medium for their propogation.\n\n\nWhen a light falls on a polished surface like mirror reflection occures and this phenominon is called reflection\n\nWhen a light falls on a transparent substance like water  and glass it passes throuhg that medium and this phenominon is called refraction\n\nMagnification is the ratio of the size of the image to the size of the object
502324
We only see the light reflected off of an object.  Google the invisibility cloak that scientists have comeup with.  It works by refracting and redirecting light .
184938
It depends on the wavelength of the light and its energy.
279286
The image of the book is not projected from the book. When you "see" an object you aren't actually seeing the object your eyes are detecting the light waves or photons of light that are transmitted from a light source then reflected off that object. If there is no light source there will be no reflected light. And you will not be able to see the object with your eyes. This only applies to visible light. If the object is warmer than it's surrounding environment it will radiate infrared light (heat) which is not visible to the human eye but can still be sensed by touch.
16651
because your eyes reflects what they capture.
45829
do u mean speed? no, the magnitude is stillt he same but the direction is changed if and only if the mirror has a smooth surface. cause if it is not. there would be many angle of reflection
92466
Optics deals with the propagation of light through transparent media and its interaction with mirrors, lenses, slits, etc. Optical effects can be divided into two broad classes: those which can be explained without reference to the fact that light is fundamentally a wave phenomenon, and those which can only be explained on the basis that light is a wave phenomenon. Let us, for the moment, consider the former class of effects. It might seem somewhat surprising that any optical effects at all can be accounted for without reference to waves: after all, as we saw in Sect. 9, light really is a wave phenomenon. It turns out, however, that wave effects are only crucially important when the wave-length of the wave is either comparable to, or much larger than, the size of the objects with which the wave is interacting (see Sect. 11). When the wave-length of the wave becomes much smaller than the size of the objects with which the wave is interacting then the interactions can be accounted for in a very simple geometric manner, as explained below. Since the wave-length of visible light is only of order a micron, it is very easy to find situations in which the wave-length of light is very much smaller than the size of the objects with which the light is interacting. Thus, ``wave-less'' optics, which is usually called geometric optics, has a very wide range of applications. \nIn geometric optics, light is treated as a set of rays, emanating from a source, which propagate through transparent media according to a set of three simple laws. The first law is the law of rectilinear propagation, which states that light rays propagating through a homogeneous transparent medium propagate in straight lines. The second law is the law of reflection, which governs the interaction of light rays with conducting surfaces (e.g., metallic mirrors). The third law is the law of refraction, which governs the behaviour of light rays as they traverse a sharp boundary between two different transparent media (e.g., air and glass).
108798
Reflection of flashlight in the retina.\n\nFurther details:
425717
if u can trap light in a totally reflective mirror(means which reflect light 100%) and don't make any HOLE in ball it definitely keep on reflecting.\nif mirror is not 100% reflecting it will absorb some portion of light every time light fell on its surface.So after some time light rays will vanish practically.(theoretically light rays will vanish after infinite time)\n \nif yr mirror ball has a hole then there is a probability that light will come out of mirror ball in its journey.\npractically this situation is not possible bcos either second or third situation always applies.
654078
Definitely, humans can actually only see a small spectrum of the actual light.  Whatever beings may be out there would likely have different vision.
120025
a double convex lens will magnify, i can't remember which ones reduce size, but i'm guessing some sort of concave lens, and lenses REFRACT light, while mirrors REFLECT light.
562436
You would have to be a mirror because mirrors so the truth of what something looks like, come in many shapes and sizes and shows reflections.
492129
Most likely it was a reflection of passing car lights.  The light could have reflected off something outside and into your room.  If there was anyone else in the house it could have been a practical joke.