Curcuma longa belongs to the

Which phenomenon does a hologram use to create an image?

A horse cannot pull a cart on a frictionless surface because:

A silicon sample is doped such that the number of holes far exceeds the number of electrons. Which of the following is true about its conductivity?

The focal length of a concave mirror is 20 cm. Where should an object be placed to get an image of the same size?

The instrument used to see the distant objects on the Earth is –

Hyperrnetropia or longsight can be corrected by using :

Two bodies of masses m and 4m are separated by a distance d. Where will the gravitational field be zero along the line joining them?

The distance- time graph for a body moving at uniform speed is?

The kinetic energy of a body is directly proportional to —