Mirror Formula Examples
Trending Questions
Q. A man uses a concave mirror for shaving. He keeps his face at a distance of 25 cm from the mirror and gets an image which is 1.4 times enlarged. Find the focal length of the mirror. (The man does not see his face flipped upside down.)
- 36.8 cm
- 87.5 cm
- 75.6 cm
- 99.4 cm
Q. A concave mirror having a radius of curvature 40 cm is placed in front of an illuminated point source at a distance 30 cm from it. Find the location of the image.
- 40 cm , behind the mirror
- 60 cm, on the side of the object
- 40 cm, on the side of the object
- 60 cm, behind the mirror.
Q. Image formed by a concave mirror of focal length 6 cm, is 3 times of the object, then the distance of object from mirror is
- -4 cm
- 8 cm
- 6 cm
- 12 cm
Q. A candle flame 1.6 cm high is imaged in a ball bearing of diameter 0.4 cm. If the ball bearing is 20 cm away from the flame, find the location and the height of the image. (Assume the paraxial approximation to hold)
- 1 mm behind the mirror and 0.08 mm high
- 1 mm in front of the mirror and 0.08 mm high
- 1 mm behind the mirror and 0.8 mm high
- 10 mm in front of the mirror and 0.08 mm high
Q. A concave mirror of focal length 10 and 15 cm are placed facing each other 40 cm apart. A point object is placed between the mirror on the mirror on their common axis and 15 cm from the concave mirror. Find the position of the image produced by reflection at convex mirror
Q. A particle goes in a circle of radius 2.0 cm. A concave mirror of focal length 20 cm is placed with its principal axis passing through the centre of the circle and perpendicular to its plane. The distance between the pole of the mirror and the centre of the circle is 30 cm. Calculate the radius of the circle formed by the image.