Question

a light ray parallel to the principal axis is incident on Bi-cibvex lense . Show that the process of refraction with the help of ray-diagram...
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Answer 1

Answer:

History is the study of the past. Events occurring before the invention of writing systems are considered prehistory. "History" is an umbrella term that relates to past events as well as the memory, discovery, collection, organization, presentation, and interpretation of information about these events.

Step-by-step explanation:

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