PROPAGATION AND REFLECTION OF LIGHT
IMPORTANT QUESTIONS OF PAST PAPERS:
1) Difference between Real image and virtual image? (2008, 2014)
2) Define the following terms:
(i) Regular reflection,(2009)
(ii) Refractive index. (2009)
(iii) Irregular Reflection (2010)
(iv) Radius of Curvature (2010)
(v) Magnification of Concave Mirror (2010)
(vi) Magnification ( 2011)
(vii) Focal length of concave mirror. ( 2011)
3) Define total internal reflection with the help of a ray diagram and Write down the 2 conditions necessary for it.(2009)
4) Write down the four uses of spherical mirror? (2009, 2017)
5) Draw a ray diagram of the image formed by a plane mirror and write its three characteristics . (2009) OR
◾ Write three characteristics of the image formed in a plane mirror? (2012,2013) OR
◾ Draw the ray diagram for formation of image in a plane mirror. (2011)
6) Draw ray diagram only to show the nature, position and size of the images formed by a concave mirror. When the object is placed ;
(a) at the center of curvature of the mirror.
(b) between the center of curvature and the principal focus (2010)
7) Draw Ray diagram for image formed by Concave mirror and write its characteristics.(2011)
8) Write three uses of concave mirror? (2012)
9) Define reflection of light and also state the two laws of reflection of light? (2013)
10) Show the image formation and characteristics by convex mirror with the help of
ray diagram? (2014)
11) Write with the help of figure, write the four rules of reflection of rays of light
by concave mirror? (2014)
12) Who invented pin-hole camera? Show image formed by its labeled diagram?
(2015)
13) Describe sign convention for real and virtual image. (2015)
14) Define irregular reflection of light and also write two points of its importance? (2016)
15) With the help of a ray diagram derive the mirror equation 1/f = 1/p + 1/q . (2018)
Numerical:
1) An object is placed at a distance of 15 cm from a concave mirror of focal length 10 cm. Find the position and nature of the image formed by it. (2009) ( Hint: Formula ; 1/f = 1/p + 1/q)
2) The radius of curvature of a concave mirror is 20 cm. Where should an object be placed so as to get its real image magnified twice. (2012) ( Hint: Formula ; M = q/p and 1/f = 1/p + 1/q)
3) The focal length of a concave mirror is 10 cm where should an object be placed so as to get its real image magnified 4 times.(2016) ( Hint: Formula ; 1/f = 1/p + 1/q)
4) The focal length of a concave mirror is 15 cm where should an object be placed so as to get its real image magnified three times (thrice).(2019) ( Hint: Formula ; 1/f = 1/p + 1/q)
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