Physics
A water tank appears shallower when it is viewed from top due to

Rectilinear propagation of light
Total internal reflection
Reflection
Refraction

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Physics
A capillary tube is partially dipped vertically in a vessel containing water. Due to capillarity water rises in the tube. The height of water rise in the tube can be increased by

Increasing the radius of the capillary tube
None of these
Decreasing the radius of the capillary tube
Increasing the height of water in the vessel

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