Refraction of Refraction — Science STD 10 — Question

When we place a glass prism in the path of a narrow beam of white light a spectrum is obtained. What happens when a second identical prism is placed in an inverted position with respect to the first prism? Draw a labelled ray diagram to illustrate it.

Does the incident and emergent ray coincide in the process of refraction through glass slab? Give reason.

The potential difference between the terminals of an electric iron is 240V and the current is 5.0A. What is the resistance of the electric iron?

Draw a ray diagram to show the path of the reflected ray corresponding to an incident ray of light parallel to the principal axis of a convex mirror and show the angle of incidence and angle of reflection on it.

Draw ray diagrams showing the image formation by a concave mirror when an object is placed:
At centre of curvature of the mirror.

What is the relation between the focal length and radius of curvature of a spherical mirror (concave mirror or convex mirror)? Calculate the focal length of a spherical mirror whose radius of curvature is 25cm.

Draw a labelled ray diagram to show how a ray of light is refracted when it passes:

1. From air into an optically denser medium.
2. From an optically denser medium into air.

Explain why, electric switches should not be operated with wet hands.

Light travels more quickly through water than through glass:

1. Which is optically denser: Water or glass?
2. If a ray of light passes from glass into water, which way will it bend: Towards the normal or away from the normal?

A concave mirror and a convex lens are held separately in water. What changes, if any, do you expect in the focal length of either?