An object is placed at a distance of 25 cm from the pole of a spherical mirror which forms a real, inverted image on the same side of object at 31.5 cm from the pole. Calculate the focal length of mirror and find the nature of the mirror.

Q.

6. a.An object 4 cm in size is placed at a distance of 25 cm from a concave mirror of focal
length 15 cm. Find the position, nature and height of the image.
b A converging mirror forms a real image of height 4 cm, of an object of height 1 cm
placed 20 cm away from the mirror. Calculate the image distance. What is the focal
length of the mirror?

Q. Find the focal length of a mirror if the object is placed $40\text{cm}$ from the pole of the mirror and the image is formed at a distance of $20\text{cm}$ from the pole on the other side of the mirror. Apply sign convention and also determine the nature of the mirror.

Q. A spherical mirror forms a real image of a point object placed in front. The distance of the image and object from the mirror is 30 cm and 0.2 m respectively.The focal length and nature of the mirror are

Q. (a) State Snell's law for refraction of light.
(b) A concave mirror forms two times magnified and real image of an object placed at $15cm$ from its pole. Determine the distance of the image from the mirror and the focal length of the mirror.

Q. Find the nature of image when an object is placed at $2f$ from the pole of a convex mirror of focal length $f$