Ray Optics Test...

With respect to air critical angle in a medium for light of red colour [λ₁] is θ. Other facts remaining same, critical angle for light of yellow colour [λ₂] will be

When a ray of light emerges from a block of glass, the critical angle is

A point source of light is kept at a depth of h in water of refractive index 4/3. The radius of the circle at the surface of water through which light emits is

A ray of light enters from a rarer to a denser medium. The angle of incidence is i. Then the reflected and refracted rays are mutually perpendicular to each other. The critical angle for the pair of media is

The refractive index of water is 1.33. The direction in which a man under water should look to see the settingsun is

A light ray from air is incident (as shown in figure) at one end of a glass fiber (refractive index µ = 1.5 ) making an incidence angle of 60° on the lateral surface, so that it undergoes a total internal reflection. How much time would it take to traverse the straight fiber oflength 1 km

A ray of light traveling in water is incident on its surface open to air. The angle of incidence is θ, which is less than the critical angle. Then there will be

Consider telecommunication through optical fibres. Which of the following statements is not true

White light is incident on the interface of glass and air as shown in the figure. If green light is just totally internally reflected then the emerging ray in aircontains