# Recently Active Geometrical Optics Questions

• A bird in air is diving vertically over a tank with speed 6 cm/s. Base of tank is silvered. A fish in the tank is rising upward along the same line with speed 4 cm/s. Water level is falling at rate of 2 cm/s. (Refractive inde ...
• A bird in air is diving vertically over a tank with speed 6 cm/s. Base of tank is silvered. A fish in the tank is rising upward along the same line with speed 4 cm/s. Water level is falling at rate of 2 cm/s. (Refractive inde ...
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• *Image* A solid iron sphere of radius=1m is just submerged in a water tank. A point source of light is kept vertically above its center at a distance 1m from the water surface. Find the area of the sphere's shadow. Refractive ...
replied2014-03-07 21:48:44
• A plane glass slab is kept over various colored letters, the letter which appears least raised is ...
• A parallel sided block of glass of refractive index 1.5 which is 36 mm thick rests on the floor of a tank which is filled with water (refractive index = 4/3). The difference between apparent depth of floor at A & B when seen ...
• A reflecting surface is represented by the equation Y=frac{2L}{pi }sin left( frac{pi x}{L} ight).~0le xle L . A ray travelling horizontally becomes vertical after reflection. The coordinates of the point (s) where this ray is ...