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a method or device for detecting and locating objects especially underwater by means of sound waves sent out to be reflected by the objects also : a device for detecting the presence of a vessel (such as a submarine) by the sound it emits in water.
What is the phenomenon of the bending of light as it passes from one medium to another called?
Which phenomenon does a hologram use to create an image?
The term ‘Isoneph' indicates the lines of equal –
If the distance between two consecutive crests is L, then the wavelength is given by______.
A stone thrown upward with a speed ’u’ from the top of the tower reaches the ground with a speed ‘3u’. The height of the tower is-
The radii of curvature of the faces of a double convex lens are 20 cm and 30 cm. If focal length of the lens is 36 cm find the refractive index of t...
A uniform wire is bent into a circle and a battery is connected across a chord that subtends an angle of 60° at the center. What is the ratio of curren...
A horse cannot pull a cart on a frictionless surface because:
An electric dipole of length 10 cm, when placed with its axis making an angle of 30° with a uniform electric field, experiences a torque of 2√...
Which among the following nuclei is more stable based on neutron-to-proton ratio?
