Listen NCERT Audio Books to boost your productivity and retention power by 2X.
Four students A, B, C and D were asked by their teacher to find the corresponding image distance for the given object distance keeping the object at various distance in case of a given convex lens of focal length 15 cm. The following observation were recorded by them.
Which student recorded the incorrect observation?
The adjoining diagram shows the path taken by a narrow beam of yellow monochromatic light passing through a 60° glass prism. Now the yellow light is replaced by a narrow beam of the white light incident at the same angle. Draw another ray diagram to show the passage of the beam through the prism and label it, to show the effect of the prism on the light.
Study the given diagram and answer the questions that follows:
i. Which defect of vision is represented in this case? Give a reason for your answer.
ii. What could be the two causes of this defect?
iii. With the help of a diagram showing how this defect can be corrected by the use of the suitable lens.