fortune favors the brave
LIGHT- REFLECTION AND REFRACTION
01. What are the various uses of concave mirrors?
02. What are the various sign conventions for reflection by spherical mirrors?
03. A convex mirror used for rear view on an automobile has a radius of curvature of 3m. If a bus is located at 5m from this mirror, find the position, nature and size of the image.
04. What are the various factors of refraction of light?
05. (a) Define Power of a Lens. Write its SI unit. (b) Find the focal length of a lens of power 2 D. What type of lens is this?
ONE MARK QUESTIONS
01. For what position of an object a real and diminished image is formed by a concave mirror?
02. What is the relation between the focal length and radius of curvature of a spherical mirror?
03. Where should an object be placed in front of the concave mirror so as to obtain its magnified erect image?
04. Explain why concave mirrors are used as shaving mirrors.
05. What type of mirrors is used in making periscopes?
06. What is the difference between a real image and a virtual image?
07. What is the nature of light?
08. If the radius of curvature of a spherical mirror is 20 cm, what is its focal length?
09. Define the principal focus of a concave mirror.
10. If an object is placed at the focus of a concave mirror, where is the image formed?
11. What is refraction of light?
12. The focal length of convex lens is 25 cm. What is its power?
13. What is the value of refractive index of glass with respect to air?
14. Where should an object be placed in front of a convex lens, so as to obtain its real, magnified and inverted image?
15. Which of the two is a diverging lens: convex or concave?
16. Which type of lens has a positive power?
17. Write the relation between the angle of incidence and angle of refraction for a medium.
18. What type of image is formed: (a) in a plane mirror (b) on a cinema screen.
19. For what position of an object, a concave mirror forms an enlarged virtual image?
20. Name the
01. What are the various uses of concave mirrors?
02. What are the various sign conventions for reflection by spherical mirrors?
03. A convex mirror used for rear view on an automobile has a radius of curvature of 3m. If a bus is located at 5m from this mirror, find the position, nature and size of the image.
04. What are the various factors of refraction of light?
05. (a) Define Power of a Lens. Write its SI unit. (b) Find the focal length of a lens of power 2 D. What type of lens is this?
ONE MARK QUESTIONS
01. For what position of an object a real and diminished image is formed by a concave mirror?
02. What is the relation between the focal length and radius of curvature of a spherical mirror?
03. Where should an object be placed in front of the concave mirror so as to obtain its magnified erect image?
04. Explain why concave mirrors are used as shaving mirrors.
05. What type of mirrors is used in making periscopes?
06. What is the difference between a real image and a virtual image?
07. What is the nature of light?
08. If the radius of curvature of a spherical mirror is 20 cm, what is its focal length?
09. Define the principal focus of a concave mirror.
10. If an object is placed at the focus of a concave mirror, where is the image formed?
11. What is refraction of light?
12. The focal length of convex lens is 25 cm. What is its power?
13. What is the value of refractive index of glass with respect to air?
14. Where should an object be placed in front of a convex lens, so as to obtain its real, magnified and inverted image?
15. Which of the two is a diverging lens: convex or concave?
16. Which type of lens has a positive power?
17. Write the relation between the angle of incidence and angle of refraction for a medium.
18. What type of image is formed: (a) in a plane mirror (b) on a cinema screen.
19. For what position of an object, a concave mirror forms an enlarged virtual image?
20. Name the