A point object is placed at a distance $30 \mathrm{cm}$ from a convex mirror of focal length $30 \mathrm{cm}$. The image will be formed at:

In each of the following questions, a statement of Assertion is given followed by a corresponding statement of Reason just below it. Of the statements, mark the correct answer as-

Assertion (A): A stick is dipped in water in a starting position. If observed side ways, the stick appears short and bent at the surface of water.

Reason (R): A light coming from the stick under goes scattering from water molecules giving the stick as hard and bent appearance.

Codes:

In each of the following questions, a statement of Assertion is given followed by a corresponding statement of Reason just below it. Of the statements, mark the correct answer as-

Assertion (A): A dentist uses a concave mirror to examine a small cavity.

Reason (R): A dentist uses a concave mirror which can form a magnified virtual image of an object.

Codes:

In each of the following questions, a statement of Assertion is given followed by a corresponding statement of Reason just below it. Of the statements, mark the correct answer as-

Assertion (A): Colours can be seen in thin layers of oil on the surface of water.

Reason (R): White light is composed of seven colours.

Codes:

In each of the following questions, a statement of Assertion is given followed by a corresponding statement of Reason just below it. Of the statements, mark the correct answer as-

Assertion (A): The mirrors used in search lights are parabolic and not concave spherical.

Reason (R): In a concave spherical mirror, the image formed is always virtual.

Codes:

Consider the following statements:

I. Clear sky appears blue due to poor scattering of blue wavelength of visible light.

II. Red part of light shows more scattering than blue light in the atmosphere.

III. In the absence of atmosphere, there would be no scattering of light and sky will be black.

Which of the statements given above are correct?