Answer:
After passing through the glass plate, the red light disperses and meets at point.
The convex lens has two refracting surfaces, and convex kens is called as converging lens. So, at the exact center of the lens, one observes a Dark spot.
Thus, the correct option is a) one observes a dark spot.
Answer:
The answer is: A) a darkspot
Explanation:
When the red light passes through the glass plate, it is scattered. the convex lens (convergent lens) has two refractive surfaces, therefore, in the center of the lens, a characteristic dark spot would be observed.
