What changes in the focal length of a concave mirror when the incident violet light on them is replaced by red light?

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

What is the focal length of a plane mirror ?

What is the focal length of a plane mirror?

What happens to focal length of a concave mirror when immersed in water ?

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

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

Violet light is incident on a converging lens of focal length f. State with reasons how focal length of the lens will change, if the violet light is replaced by red light.

How does the angle of minimum deviation of a glass prism vary, if the incident violet light is replaced by red light? Give reason.