Last evening I went to the optician and bought spectacles.

Last evening my friend tells me the funny joke that I have ever heard.

Harish went with his mother to the market and bought carrots, tomatoes, radish and potato from a vegetable vendor. Which of these vegetables represent homologous structures?

Surabhi from Std.X uses spectacles. The power of the lenses in her spectacle is 0.5 D. Answer the following question from the given information: (i) Identify the type of these used in her spectacles. (ii) Identify the defect vision Surabhi is suffering from. (iii) Find the local length of the lenses used in her spectacles.