Questions in Ray Optics and Optical Instruments

Select	Question
	At the time of total solar eclipse, the spectrum of solar radiation would be
	Angle of deviation $(\delta $) by a prism (refractive index = $\mu $ and supposing the angle of prism A to be small) can be given by
	Angle of prism is A and its one surface is silvered. Light rays falling at an angle of incidence 2A on first surface return back through the same path after suffering reflection at second silvered surface. Refractive index of the material of prism is
	A ray of light incident normally on an isosceles right angled prism travels as shown in the figure. The least value of the refractive index of the prism must be
	When seen in green light, the saffron and green portions of our National Flag will appear to be
	At sun rise or sunset, the sun looks more red than at mid-day because
	Line spectrum contains information about
	Missing lines in a continuous spectrum reveal
	A source emits light of wavelength 4700Å, 5400 Å and 6500 Å. The light passes through red glass before being tested by a spectrometer. Which wavelength is seen in the spectrum
	A ray passes through a prism of angle 60° in minimum deviation position and suffers a deviation of 30°. What is the angle of incidence on the prism