victorytaya.blogg.se - Regular reflection definition physics

No light enters the eye from the shadow of the object.ģ. Image is seen when light coming from the object after reflection or refraction enters the observes’s eye.Ģ. Shadow is formed when light falls on the opaque body.Ģ. Image is formed due to reflection or refraction of lightġ.

What is the difference between image and shadow?ġ. The colour of the opaque object does not affect the colour of the shadow that is formed. On this screen is a dark patch, or shadow, with the same outline as the object surrounded by light. The wall or ground behind the opaque object is the screen. Everywhere else around the opaque object, the light continues in a straight path until it bounces off the ground or wall behind the object. It is formed when light hits the opaque object which does not let the light pass through. What is a shadow? How is it formed? How does the colour of an opaque object affect the colour of the shadow?Ī shadow is a dark outline or image cast by an opaque object that blocks light coming from a source of light. The length of the shadow also changes from season to season. Yes, the direction of shadow changes as the sun changes its position during the day. an opaque object in the way of light, andĭoes the direction of shadow change during the day? Does the length of shadow also change from season to season?.What do we need in order to see a shadow? All the space behind the opaque object up to some distance behind it seems to be filled with the shadow Shadow is not just the two-dimensional outline that you see on the ground. Whether a shadow is two-dimensional or three-dimensional? Wood and bricks are the substances through which light does not pass. Give examples of two substances through which light does not pass? On what factor does the proportion of light that enters an object depend?Īn object which comes to the path of light is called an obstacle. Write down four man-made sources of light.

By covering one side of the glass sheet by butter paper.

By smearing a thin layer of oil we may convert a transparent glass sheet into a translucent sheet.

How will you convert a transparent glass sheet into a translucent sheet? Suggest any two ways to do it. We may say that clouds behave as translucent object. What can you say about the ability of such clouds to transmit light? ‘ Sometimes, you are able to see the Sun or the Moon behind the clouds. On the basis of the experience, we observe our eyelids are opaque. Do you notice any difference? On the basis of this experience, state whether your eyelids are transparent, translucent or opaque. Now, cover the eyes with your palm still keeping them closed. Translucent objects are Blood, milk, wax, skin, balloon, rubber.Ĭlose your eyes while looking towards bright sunshine. Opaque objects are A stone, wood, a heap of salt, dense smoke, and membrane of tabla. Wax, spectacles, a heap of salt, a stone, dense smoke, wood, skin, balloon, rubber, membrane of a tabla, blood and milk. One can see clearly through these objects.Ĭlassify the following into transparent, opaque and translucent objects: Those objects which allow light rays to pass through them completely are called transparent objects. These are the objects through which one cannot see properly. Those objects which allow only a small part of the light rays to pass through them are called translucent objects. Those materials which do not allow light to pass through them, are called opaque objects. Non-luminous objects: Objects that do not give out light of their own, e.g., the moon, chair, shoe, pen, etc. Luminous objects: Objects that give out or emit light of their own, e.g., sun, torch, light, bulbs, etc. What are luminous and non-luminous objects?

The objects which emit light of their own are called luminous bodies, e.g., the sun, the stars, etc.