Q. 109. Difference between real and virtual images.
Q. 110. Write the uses of spherical mirrors.
Q. 111. Describe the mirror formula:
Q. 112. What is magnification and how is it related to x and v.
Q. 113. Draw a ray diagram of image formation when the object is placed in front of a convex lens at different position.
Q. 114. What do you understand by spherical aberration and how it is corrected?
Q. 115. What is total internal reflection and critical angle.
Q. 116. Why do stars twinkle on a clear night?
Q. 117. What is mirage? How does it occur?
Q. 118. What is dispersion? How will you show that sun-light is composes of seven colours?
Q. 119. What are primary colours? Why are they called so?
Q. 120. What is the focal length of a plane mirror?
Q. 121. Which cells are responsible for colour perception?
Q. 122. Draw labelled diagram of human eye and describe its working.
Q. 123. How do we see colours? What is colour blindness?
Q. 124. What do you under stand by “least distance of distinct vision”.
Q. 125. Describe construction, working and principle compound micro cope. State its magnifying power.
Q. 126. What is persistence of vision? Write the process where it is used.
