Question

please tell all the answers please​

Answer 1

1) the imaginary straight line joining the centre of curvature and pole of the mirror is called

ANSWER = principal Axis

2) the increase in the surface area of a solid on heating is called

ANSWER = thermal expansion

3) convection is the mode of transfer of heat in

ANSWER = Fluids

4) for a smaller source of light and bigger objects, the more the distance between the object and the screen ________ will be shadow

ANSWER = The size of the shadow increases as the distances between the source of light, the object and the screen increase.

5) Lights travels in a _________ path

ANSWER = straight line path

6) the midpoint of the spherical mirror is called _______

ANSWER = pole (p)