CBSE Class 7 Science Light Worksheet with Solution by Expert Science Mam. Students of 7th Grade can solve this worksheet for extra preparation before exam. Private Teacher or Guardians of the Students can copy all the questions of this chapter and will match after solve their students.
Light Class 7 Worksheet
Worksheet for Chapter No.15):- Light
The following questions are important for your exams for 1 mark 2 mark or 5 marks. First solve the questions on your own and then saw the solution for understanding it better.
Practice worksheet for class 7
Q.1.) What do you mean by real image?
→ An image formed on a screen is called as a real image.
Q.2.) What do you mean by virtual image?
→ The image formed by a plane mirror could not be obtained on a screen such an image called a virtual image.
Q.3.) What is the path of a light?
→ The path of a light is along a straight line. Light always travels along straight line.
Q.4.) What is a mirror? Give example?
→ Any polished or shining surface at as a mirror.
Examples are shining surface of stainless-steel metal and a glass mirror.
Q.5.) What are the characteristics of image formed by a mirror?
→ 1.) In an image formed by a mirror the left side of the object is a scene as on the right side in the image.
2.) And the right side of the object appears to be on the left side in the image.
Q.6.) How many colors composed by white light? Which are those?
→ White light is composed of seven colors. Violet, Indigo, blue, green , yellow ,orange, red are the colors present in white light.
Q.7.) Define the term reflection of light?
→ The phenomenon of light in which the light is incident on a certain polish or a mirror like surface and gets reflected back this is called as reflection of light.
Q.8.) What is the difference between real image and virtual image?
→ Really image is formed by convergence of light rays after reflection really images can be seen on a screen whereas virtual image is apparent convergence of diverging light rays after reflection virtual images not be seen on screen.
Q.9.) Define the following terms?
→ 1.) Concave mirror- if the inner surface is a reflecting surface of a spherical mirror, then it is called a concave mirror.
2.) Convex mirror- if the outer surface is a reflecting surface of a spherical mirror, then it is called as convex mirror.
Q.10.) Which mirror have ability to form a real image and which lens have ability to form virtual image?
→ 1.) Concave mirror can form a real image.
2.) Concave lens can form a virtual image.
Q.11.) Write two uses of lenses?
→ 1.) Lenses are used in telescope.
2.) Lenses are widely used in spectacles and microscopes.
Q.12.) Which images formed by concave lens?
→ A concave lens always forms virtual erect and a smaller image than the object.
Q.13.) Which images formed by convex mirror?
→ Images formed by a convex mirror are erect virtual and smaller in size than the object.
Q.14.) We cannot see candle flame through a bent thermocol pipe? Give reason?
→ 1.) We cannot see a candle flame through a bent thermocol pipe because light could not travel through the bent pipe as light travels only in a straight line.
Q.15.) what kind of images formed by a concave mirror?
→ Concave mirror can form a real and inverted image.
Q.16.) what kind of images formed by a plane mirror?
→ The image formed by plane mirror is erect it is virtual and it is of the same size as the object.
Q.17.) what do you mean by converging lens and diverging lens ?
→ 1.) A convex lens convergence the light generally falling on 8 and therefore it is called as a converging lens.
2.) A concave lens diverges the light and it is called as a diverging lens.
Q.18.) What kind of precautions should we take while handling convex lens?
→ 1.) Not to focus unite with a convex lens on any part of your body.
2.) Do not look through a lens at the sun or a bright light it will
be dangerous for you.