Ray Optics Test...

Three lenses L₁, L₂, L₃ are placed co-axially as shown infigure. Focal length\'s of lenses are given 30 cm, 10 cm and 5 cm respectively. If a parallel beam of light falling on lens L₁ emerging L₃ as a convergent beam such that it converges at the focus of L₃. Distance between L₁ and L₂ will be

An object is placed at a point distant x from the focus of a convex lens and its image is formed at I as shown in the figure. The distances x, x\' satisfy the relation

The diameter of the eye-ball of a normal eye is about 2.5 cm. The power of the eye lens varies from

In a thin spherical fish bowl of radius 10 cm filled with water of refractive index 4/3 there is a small fish at a distance of 4 cm from the centre C as shown in figure. Where will the image of fish appear, if seen from E

A water drop in air refractes the light ray as

Which of the following ray diagram show physically possible refraction

Following figure shows the multiple reflections of a light ray along a glass corridor where the walls are either parallel or perpendicular to one another. If the angle of incidence at point P is 30°, what are the angles of reflection of the light ray at points Q R, S and T respectively

When the rectangular metal tank is filled to the top with an unknown liquid, as observer with eyes level with the top of the tank can just see the corner E; a ray that refracts towards the observer at the top surface of the liquid is shown. The refractive index of the liquid will be