# Question Bank on Light

Topics: Optics, Refraction, Total internal reflection Pages: 8 (2968 words) Published: February 11, 2013
QUESTION BANK – LIGHT

01. How do we see the things in light?
02. Write the different properties of light?
03. What are the different optical phenomena that takes place due to light? 04. Deflection of light?
05. State laws of reflection of light?
06. What are the properties of the image formed by a plane mirror? 07. What are the two types of spherical mirrors?
08. What is a concave mirror and convex mirror?
09. Define the following of a spherical mirror?
a) pole b) centre of curvature c) Principal focus d) Principal axis e) Radius of curvature f ) aperture g) focal length

10.What is the relationship between the radius of curvature and focal length?
10. A ray of light makes an ∟30° to the normal. Find out what angle does a reflected ray from a plane mirror will make with respect to the reflecting surface? 11. What is the angle of reflection of an incident ray that travels along the normal to the reflecting surface? Why? 12. A ray of light makes an angle of 40° with respect to the principle axis of a concave mirror. Find out what will be the angle subtended by the reflected ray with respect to the principle axis? Why? 13. A ray traveling parallel to the principle axis hits a point M on the concave mirror. If the ray makes an angle of 30° to the line drawn from M to the centre of curvature what will be the angle made by the reflected ray that passes through the principle focus after reflection with respect to the same line? Why? And how do you call the line? 14. If a paper is kept for a long time at the principle focus of a concave mirror exposed to the sunlight what will happen to the paper? Explain. 15. For spherical mirror of small aperture where does the principle focus lie? 16. With a suitable diagram write the important rules to be followed to draw the ray diagram for a concave mirror. 17. Complete the given ray diagram

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18. Draw a ray diagram for a spherical mirror which forms a real image of magnification less than one 19. Draw a ray diagram for a spherical mirror which forms a real image of magnification more than one 20. Draw a ray diagram for a spherical mirror which forms a virtual image of magnification less than one 21. Draw a ray diagram for a spherical mirror which forms a virtual image of magnification more than one 22. Draw a ray diagram for the spherical mirrors for the object at infinity 23. How does the nature and position of the image change when the object recedes a concave mirror and convex mirror 24. Definition linear magnification

25. Write the mirror formula and formula to find out linear magnification 26. Draw a ray diagram for a spherical mirror for m=1 for real image 27. Write the new Cartesian convention rules with a diagram. 28. A concave mirror forms a real image at a distance of 25 cm for an object distance of 50 cm. Calculate the focal length of the mirror and its radius of curvature. Calculate the magnification produced by the mirror. 29. What are the uses of a concave mirror and a convex mirror? 30. Why cannot a dentist use a convex mirror as his clinical mirror instead of a concave mirror? 31. Why cannot a plane mirror be used as a rear view mirror? 32. Why cannot a concave mirror be used as a rear view mirror? 33. The focal length of a concave mirror and a convex mirror is 25 cm. If an object is kept at a distance of 40cm from both of them calculate the image distance due to the mirrors individually and the magnification produced by both of them. 34. The magnification produced by a mirror is 4 for both type of images in two different cases. If the radius of curvature of the mirror is 40cm calculate the object distance and image distance for both the cases

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35. The magnification produced by a mirror is 0.25 for an image formed in the other side...