BASIC QUESTION FROM LIGHT (PHYSICS)

1. Write the laws of reflection?
2. Why myopia happens? How can it be cured?
3. Why hypermetropia happens? How it can be cured?
4. What is good fuel?
5. Write benefit and limitation of thermal power plant?
6. Write the benefit and limitation of solar power plant?
7. Write the use of concave, convex and plane mirror?
8. Write the name of parts of eye and write its function.
9. Why sky looks black form the space?
10. Why sky looks blue form earth?
11. Why red light use in traffic singles for danger sign?
12. Write the laws of refraction and also write snell’s law?
13. Why sun became two minutes before and sunset two minutes after?
14. Find the power of lens if the focal length of eye is 50 cm.
15. Find the focal length of concave mirror if the image distance is 5 cm and object distances of 5 cm. write the properties of image.
16. Write the mirror formula and lens formula?
17. If the height of object is 25 cm and height of image is 50 cm find the magnification.
18. Define the following
a. Power of the lens
b. Focal length
c. Magnification
d. Principal axis
e. Center of curvature
19. What is refractive index? Write its SI unit.
20. Ashish is student of class 10. One day he saw a blind person on the road and he help that person to cross the road the blind person thanks Ashish and that same day he decided to donate his eye.
a. What values shown by Ashish?
b. Which part of eye can be transplanted?
c. What happens when we see the sun directly?
d. What value shown by blind person to Ashish
21. What is wind energy? Write its benefit and limitation?
22. What is tidal energy? Write its benefit and limitation

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