Class 7 Science Light - Fill in the blanks - Worksheet 07

Fill in the blanks with the words given in the box to complete the article "REFLECTION OF LIGHT".

Reflection of light is referred to the change in the __________ of light upon ________________ a surface. This change in direction occurs whenever light hits a surface, irrespective of the ________________ or the nature of the surface. The difference here is that in a reflective surface such as the shiny spoons and plates and mirrors, the reflection is uniform throughout the surface leading to a crisp ______________. Whereas on rough surfaces, the reflection of light is ____________________ leading to a __________ image. On even rougher surfaces such as walls and the ground, the reflection is arbitrary and hence there is no ______________ formation. Did you know that a mirror can create different types of images? They are called Real image and Virtual image.

The image location is the location in space where all the reflected light appears to come out or ________________ from. Since the reflected light appears to ______________ from this position, a person who sees this image will feel like the actual object is placed behind the reflecting surface. This is where the concept of real and virtual image arises from.

Virtual images are formed when light from a single source spreads out or ______________ after passing through a lens or after being reflected. __________ that they the light splits up and travels in a different direction never to meet again. A virtual image is formed at the point where they seem to ______________, but since they never actually ______________, a virtual image cannot be ________________ onto a __________ like in the cinemas. A virtual image created by the reflection of light from a mirror will always appear to be ______________ the mirror creating it, which is impossible since light does not pass through the image but is reflected. This is why it is referred to as a point of ________________ divergence. Any image you see reflected by a __________ flat mirror is a virtual image. You can see this by keeping an object in __________ of a mirror and seeing where it appears to be located in the mirror.

Real image, in contrast, is formed when the rays from the reflection of light ______ or ________________ at a single point on the other side of the lens. This means the image being formed actually ______________ since the rays are converging. Therefore, unlike in virtual image, if a ______________ is placed in the __________ of a real image, the image will be created on the screen. Real images are generated by the ________________ in the cinemas, by the cameras and by the lenses in our eyes. ______ image occurs where the rays of light converge and virtual image occurs where the rays of light appear to ______________.