A man can read the number of a distant bus clearly but he finds difficulty in reading a book. The defect of vision he has is …………

A student sitting in the last row of the class room is not able to read clearly the writing on the black board. Name the defect he is suffering from.

A doctor has advised to use + 1D and + 1.5D lens for his left eye and right eye respectively of a patient. What type of defect he has …………

Far point of a person is 5 m. In order to have normal vision what kind of spectacles should he use ?

The formation of rainbow in the sky is due to the dispersion of sunlight by …………

A ray of light incident with 45° on one of the lateral surface of an equilateral prism placed on the horizontal surface of a table. Find the minimum deviation produced by a prism.

A prism with an angle A = 60° produces an angle of minimum deviation of 30°. Find the refractive index of the prism.

The value of angle of deviation produced by a prism ………

The splitting of white light into different colours is called……

The colour of white light which suffers the maximum bending on passing through a glass prism is ………

The colour of white light which suffers the minimum refraction on passing through a glass prism is …………

In the spectrum of white light the two colours appearing at the ends are ………

Which of the following colour of white light has least Wavelength ?

Which of the following colour of white light has maximum wavelength ?

The relation between wavelength and deviation is …………