List of top Physics Questions on Optics asked in VITEEE

A thin film of soap solution (\(n = 1.4\)) lies on the top of a glass plate (\(n = 1.5\)). When visible light is incident almost normal to the plate, two adjacent reflection maxima are observed at two wavelengths 420 nm and 630 nm. The minimum thickness of the soap solution is

Rising and setting sun appears to be reddish because

Four independent waves are represented by equations \[ X_1 = a_1 \sin \omega t, \, X_2 = a_2 \sin 2 \omega t, \, X_3 = a_3 \sin \omega t, \, X_4 = a_4 \sin (\omega t + \delta) \] Interference is possible between waves represented by equations

Following diffraction pattern was obtained using a diffraction grating using two different wavelengths \( \lambda_1 \) and \( \lambda_2 \). With the help of the figure identify which is the longer wavelength and their ratios.

In Young's double slit experiment, the interference pattern is found to have an intensity ratio between bright and dark fringes is 9. This implies the

Our eyes respond to wavelengths ranging from:

A ray of light strikes a piece of glass at an angle of incidence of 60° and the reflected beam is completely plane polarised. The refractive index of glass is:

In an experiment on Newton's rings, the diameter of the 20th dark ring was found to be 5.82mm and that of the 10th dark ring was 3.16mm. The wavelength of light used is:

The refractive index of a material is 1.5. The angle of incidence for which the angle of refraction is 30° is: