Answer the following questions (Attempt any seven)
(i) What is septic tank?
(ii) What are the effect of thunderstorms?
(iii) Distinguish between peal and virtual images.
Answers
Answer:
(I) A septic tank is an underground tank where faeces, urine, and other waste matter is made harmless using bacteria
(II) Thunderstorms can bring heavy rains (which can cause flash flooding), strong winds, hail, lightning, and tornadoes. Severe thunderstorms can cause extensive damage to homes and property.
(III) A real image and a virtual image are different forms of image. The main difference between real and virtual images lies in the way in which they are produced. A real image is formed when rays converge, whereas a virtual image occurs where rays only appear to diverge.
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Answer:
1. A septic tank is an underwater sedimentation tank used for wastewater treatment through the process of biological decomposition and drainage.
2. Thunderstorms have wide-ranging effects on human life, including electrocution, shock, and even worse, deaths.
3. Real Image - a) The real image is the image, which forms when the light rays meet at a particular point after reflection from the mirror. The image, which forms when the light rays appear to meet at a definite point, after reflection from the mirror, is termed as a virtual image. b) Rays actually converge. c) The image formed is inverted
Virtual Image- a) Interaction of light rays actually converge Rays perceived to converge b) Rays perceived to converge. c)The image formed is upright or erect.
Explanation: