Light is incident from air on the surface of a glass slab. In the air the light beam makes an angle of 30° with the normal to the surface, while in the glass the angle is 25°. What is the index of refraction of the glass?​

When is a current produced? when the terminals of an electrochemical cell are connected by a wire if the electric circuit is opened in an electrochemical cell if the electrolyte is removed from an electrochemical cell when the electrodes are reversed in an electrochemical cell