Presentation on theme: "Class-X Light, Reflection and Refraction."— Presentation transcript:
1 Class-X Light, Reflection and Refraction. Science Question bankClass-X Light, Reflection and Refraction.One word answer type questions1. Which form of energy enables us to see our surroundings?2. What is the angle of incidence if the angle of reflection is45◦?3. Which mirror is used for rear view in the vehicles?4. Where the image will be formed for a convex lens if anobject is placed at focus?5. What we call the line passing through focus and pole of amirror?
2 Fill in the blanks type: 6.__________mirror is used by a dentist to see the large image oftooth7. The power of lens is measured in_________ .8. The ratio of sine of angle of incidence to the sine of angle ofrefraction is called________.9. _______ lens has negative power.10._______ mirror always forms erect image.True/false type question:11. A ray of light can travel through an opaque medium.12. A plane mirror always forms a real image.13. The ratio of size of image to the size of object is known asmagnification.14. When a ray travels from denser to rarer medium then it bendstowards the normal.15. The image formed by concave lens is in the same side that ofobject
3 MCQ type:16. For normal incidence, the angle of reflection isa. 0 ◦ b. 45 ◦ c. 90 ◦ d. 180 ◦17. The focal length is taken as negative fora. convex mirror, convex lens b. concave mirror, concave lensc. convex mirror, concave lens d. concave mirror, convex lens18. Image formed by plane mirror isa. virtual and erect b. laterally invertedc. of same size that of object d. all of above19. Convex mirror is used for rear view becausea. it always forms real image b. it always forms virtual imagec. image forms in front of mirror d. image formed is large in size20. The relation between focal length (f), object distance (u), image distance (v)for a lens isa. 1/v-1/u=1/f b. 1/v+1/u=1/f c. 1/u-1/v=1/f d. 1/f-1/u=1/v
4 21. Match the column for convex lens: Position of objectPosition of the imageAt infinityBetween f2 and 2f2At 2f1Beyond 2f2Beyond 2f1At f2Between f1and OAt f1Same side that of objectBetween f1 and 2f1At 2f2
5 Numerical problems:22. Calculate the angle of reflection for the given ray diagram23. For a concave mirror the focal length is 12 cm. calculate thediameter of that sphereof which the given mirror is a part.24. Draw a ray diagram for spherical mirror having m=1 for realimage.25. The magnification produced by a mirror is 4 for both type ofimages in two different cases. If the radius of curvature ofmirror is 40 cm. calculate the object distance and imagedistance for both the cases.