A thin prism having a refracting angle of 10° is made of glass of refractive index 1.42. This prism is combined with another thin prism made of glass of refractive index 1.7. This combination produces dispersion without deviation. The refracting angle of t he second prism should be:

What are the characteristics of an image formed by a plane mirror?

Given below are two statements: an Assertion [As] and a Reason [R]. Assertion [As]: A convex mirror cannot form real images of real objects. Reason [R]: Convex mirrors converge the parallel rays of light that are incident on them. Choose the correct alternative: