Refraction through a Lens — Physics STD 10 — Question

Name one property of waves that do not change when the wave passes from one medium to another.

In the following case write yes, if the work is being done and no if no work is being done.
A man trying to push a wall.

Energy can exist in several forms and may change from one form to another. For the following, state the energy changes that occur in:
the unwinding of a watch spring

How will the direction of force be changed, if the current is reversed in the conductor placed in a magnetic field?

Define Uniform circular motion.

A ray of light is normally incident on one face of an equilateral glass prism. Answer the following:
what will be the angle of incidence at the second face of the prism?

Explain the meaning of the statement 'the power of an appliance is 100 W'.

Compare the speeds of light of wavelength 4000 Å (i.e. violet light) and 8000 Å (i.e. red light) in vacuum.

Name the subjective property of sound related to its frequency.

State the energy changes which take place when:
Food is digested by animals.