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Fill in the blanks

1. Incident and reflected rays are on either side of ………………. . 

2. The angle made by incident ray with the normal is called ………………. . 

3. The angle made by the reflected ray with the ………………. is called the angle of reflection. 

4. The distance of the object from the mirror is called ………………. . 

5. The distance of the image from the is called image distance. 

6. When you are eating food with right hand it appears to be eating with left hand. This characteristic is called ………………. . 

7. The image which cannot catch on the screen is called ………………. . 

8. Plane mirror forms ………………. image. 

9. The relation between number of images formed and the angle between two plane mirrors is ………………. . 

10 . ………………. is an instrument used in submarines to see the objects or persons above the water level. 

11. ………………. mirror reflect the light in different directions. 

12. ………………. mirror reflect the light to one point. 

13. A ………………. mirror forms real and virtual images, erect and inverted images, smaller, same size and bigger images depending on the position of object infront of it. 

14. Ophthalmoscope is fitted with a ………………. mirror having a small hole near its center. 

15. Dentists also use ………………. mirrors to get a bigger image of the teeth. 

16. ………………. mirrors are used in head lights of the vehicles. 

17. A piece of glass or any other transparent material with curved sides is called ………………. . 

18. Lens which is thick in center and thin at the edges is called ………………. lens. 

19. Lens which is thin in the centre and thick at the edges is called ……………….  ens. 

20. ………………. light has been proven effective in protecting retina than blue light which causes damage to retina. 

21. Splitting of white light into seven colours is called ………………. .

1 Answer

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Best answer

1. normal 

2. angle of incidence 

3. normal 

4. object distance 

5. mirror 

6. lateral inversion 

7. virtual image 

8. virtual 

9. 360°/θ -1 

10. periscope 

11. convex 

12. concave 

13. concave 

14. concave 

15. concave 

16. concave 

17. a lens 

18. convex 

19. concave 

20. Yellow 

21. dispersion

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