Light Class 8

Welcome to question/answer paper -  Light Class 8

1. 
The values of angle x and y are

2. 
If a person is suffering from hypermetropia, which object is he/she most likely to see blurred?

3. 
The angle between an incident ray and normal is 30 degree. The angle between the incident ray and reflected ray is

4. 
Which one of this controls the amount of light entering the eye

5. 
The no of images formed when the angle between two mirrors is 24 degree

6. 
The image of an object is retained on the retina for about

7. 
When the eye lens becomes cloudy a person suffers from

8. 
Which of the following letters will be seen without any change in plane mirror

9. 
Which of the following instrument is used to see objects on the surface of sea water by submarine

10. 
A prism produces

11. 
When light is incident upon a rough surface, it is reflected in many directions called

12. 
Our eyes make an image on

13. 
Night blindness occurs due to deficiency of vitamin

14. 
A boy is short sighted. Which of the following statement is correct?

15. 
The perpendicular drawn at any point on a mirror is called

16. 
When the ciliary muscles relax, the thickness of the lens

17. 
Incident angle is equal to

18. 
VIBGYOR is formed after

19. 
An object is placed 10cm in front of a plane mirror. The distance between the object and its image is

20. 
The cones of the eyes are sensitive to

21. 
Angle i is equal to the angle r

22. 
The image formed by a mirror is

23. 
An optician holds a test card 50 cm behind a patient. The patient then looks in the plane mirror which is 100cm away. How far away from the patient’s eye is the image of the test card?

24. 
Which of the following satisfy the first law of reflection

25. 
The normal to the surface of a plane mirror makes an angle

26. 
Which of the following is located just below the macula

27. 
The size of the pupil controlled by

28. 
Which of the following can be treated using a concave lens of suitable focal length?

29. 
The angle made by an incident ray with the normal is 45 degree. What is the angle of reflection?

30. 
A polished surface can act as a

31. 
Reflected light when reflected again forms

32. 
Splitting of light into its color is known as

33. 
Number of mirrors are used in kaleidoscope are

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