[" 1.How does the power of a convex lens vary,if the incident "],[" red light is replaced by violet light? "]

How does the power of a convex lens vary,if the incident violet light is replaced by red light?

In a YDSE experiment red light is replaces by violet light . Then

Red and violet light have

What changes in the focal length of a convex lens occur,when the incident violet light on them is replaced by red light?

How does focal length of a lens change when red light is replaced by violet light?