Light

 Light

Q.1. What makes things visible?

Q.2. Name some luminous objects.

Q.3. Name some non-luminous objects.

Q.4. What is reflection of light?

Q.5. Describe

1. Incident Ray

2. Reflected Ray

3. Point of Incidence

4. Normal

5. Angle of Incidence

6. Angle of Reflection

Q.6. What are the laws of reflection?

Q.7. What happens when the incident ray is normal to the plane of the mirror?

Q.8. What happens when the angle of incidence is 45o?

Q.9. What is regular reflection? Give its other name.

Q.10. What is irregular reflection? Give its other name.

Q.11. What kind of image is formed by the plane mirror?

Q.12. What are the characteristics of an image formed by a plane mirror?

Q.13. What are multiple reflections?

Q.14. If two mirrors make an angle θ between them and the object is placed in between the two mirrors and the number of images is n then what is the relation between n and θ?

Q.15. What is a periscope?

Q.16. Periscope works on what principle?

Q.17. What is a Kaleidoscope?

Q.18. How does a Kaleidoscope work?

Q.19. What is dispersion of light?

Q.20. Name the seven colors found in the dispersion of light?

Q.21. Who first observed dispersion?

Q.22. Which colored light deviates the most?

Q.23. Which colored light deviates the least?

Q.24. Name a natural phenomenon showing dispersion.

Q.25. What are eyes?

Q.26. Explain the structure of the eye?

Q.27. What is a blind spot in the eye?

Q.28. The image persists on the retina for how many seconds?

Q.29. How is an object perceived as moving by our eye?

Q.30. What is myopia? What is the other name for it?

Q.31. How can myopia be removed?

Q.32. What is a hypermetropia? What is the other name for it?

Q.33. How can hypermetropia be removed?

Q.34. What is a cataract? How can it be cured?

Q.35. How can we take proper care of our eyes?

Q.36. What is a braille system?

Q.37. Who was Louis Braille?

Q.38. Describe the Braille System?

Q.39. Give an account of different personalities who achieved in different fields even being blind?

Questions : Light and Shadow

 Light and Shadow

Q.1. What are the different sources of light?

Q.2.  How are shadows made?

Q.3. How does light travel?

Q.4. What are some of the things that light can pass through?

Q.5. Sun is the source of what?

Q.6. What is necessary to see objects around us?

Q.7. How are eyes useful to see things?

Q.8. Name the various sources of light.

Q.9. Which is the main source of light?

Q.10. What are the objects blocking light called?

Q.11. Give some examples of objects which block light.

Q.12. What happens when an opaque object blocks all light?

Q.13. Where are shadows formed?

Q.14. How does the length of a shadow differ in various daytime?

Q.15. How are shadows formed at night?

Q.16. What are the objects through which light can pass called?

Q.17. What are translucent objects?

Questions : Light

 Light

Q.1. What is light?

Q.2. What is the effect of no light?

Q.3. How does light travel in space?

Q.4. What is called the property of light to travel in straight lines?

Q.5. What is reflection of light?

Q.6. What are the properties of an image formed by a plane mirror?

Q.7. What is lateral inversion?

Q.8. Why is the word AMBULANCE written in an inverted manner on an ambulance van?

Q.9. What are the uses of plane mirrors?

Q.10. What are spherical mirrors?

Q.11. What are the two types of spherical mirrors?

Q.12. Give some examples of curved mirrors.

Q.13. What is the property of an image formed by a concave mirror?

Q.14. What happens when the distance of an object from a concave mirror increases?

Q.15. What are the uses of a concave mirror?

Q.16. What is the property of an image formed by a convex mirror?

Q.17. What are the uses of convex mirrors?

Q.18. What is a lens?

Q.19. Where are lenses used?

Q.20. What are the two types of basic lens?

Q.21. What is the property of a convex lens?

Q.22. What is the property of a concave lens?

Q.23. What is the difference in the image formed by convex lens and concave lens for a for off object?

Q.24. What kind of image is formed by a convex lens?

Q.25. What kind of image is formed by a concave lens?

Q.26. What is the other name of a convex lens?

Q.27. What is the other name of a concave lens?

Q.28. Name the seven colours which make a rainbow.

Q.29. What is dispersion of light?

Q.30. What is a spectrum of white light?

Q.31. What is a Newton's disc?

Questions : Light, shadows and Reflections

 Light, Shadows and Reflections

Q.1. What are the activities in our daily life for which we need light to perform it?

Q.2. What is light?

Q.3. What are luminous objects? Give examples.

Q.4. What are non luminous objects? Give examples.

Q.5. Name the types of objects based on the way they transmit light.

Q.6. What are Opaque objects? Give examples.

Q.7. What are transparent objects? Give examples.

Q.8. What are translucent objects? Give examples. 

Q.9. What is rectilinear propagation of light?

Q.10. What is a shadow?

Q.11. How does the size of the shadow vary?

Q.12. What is a pinhole camera?

Q.13. What is reflection of light?

Q.14. Does a mirror change the direction of light that falls on?

Questions : Light, Shadow and Eclipses

 Light, Shadow and Eclipses

Q.1. What is light?

Q.2. Name the main source of natural light for us?

Q.3. Name some artificial or man made sources of light?

Q.4. What are the uses of light?

Q.5. How do we see objects around us?

Q.6. What is the name given to a substance through which light can travel?

Q.7. What are transparent substances? Give some examples.

Q.8. What are translucent substances? Give some examples.

Q.9. What are Opaque objects? Give some examples.

Q.10. What is a shadow?

Q.11. What are the necessary requirements for the formation of a shadow?

Q.12. On what factors does the size and shape of a shadow depend?

Q.13. Where is the shadow of an object cast?

Q.14. If the sun rises in the East, in which direction will its shadow be cast?

Q.15. What are eclipses?

Q.16. At what time the shadow is the longest?

Q.17. What is the eclipse of the sun called?

Q.18. What is the eclipse of the Moon called?

Q.19. How does a solar eclipse occur?

Q.20. How does a lunar eclipse occur?

Q.21. How is the moon visible to us?

Q.22. Solar eclipse occurs on which day?