Optics Answers

If you stand 2m in front of a plane mirror, how far from you is your image?

If rays of light parallel and close to the principal axis are incident on a ______ mirror, they converge to a point after reflection from the mirror.

A camera obscura used by a portrait painter is located 6m from a child who stands 1m tall. How tall is her image if the back of the camera obscura is 2m away?

What type of mirror would you use to produce a magnified image of your face?

The image of an object kept between the centre of curvature and the focus of a concave miror is
(1) erect, real with magnification> I
(3) erect, virtual with magnification< I (5) inverted, real with magnification < 1 (2) inverted, real with magnification>1 (4) inverted, virtual with magnification <1

Two thin lenses of focal length f, and f, are in contact. The focal length f of the lens combination is given by

A certain prism is found to produce a deviation of 51°0', while it produces a deviation of 62°48' for two values of the angle of incidence namely 40°6' and 82°42' respectively. Determine the refracting angle of the prism, the angle of incidence at minimum deviation and the refractive index of the material of the prism.

If the sun is 150 million km away from the earth, how long does it take sunlight to reach the earth

The focal length of a plano-convex glass lens is 20cm muo of glass =1.5. The plane face of it is silvered. An illuminating object is placed at a distance of 60cm from the lens on its axis along the convex side. Then the distance of the image in cm is

A coin lies at the bottom of a tank containing water to a depth of 130cm. If the refractive index is 1.3. Calculate the apparent depth of the coin.