Ray Optics Test...

A convex lens of focal length 10 cm and image formed by it, is at least distance of distinct vision then, the magnifying power is

If two +5 D, lenses are mounted at some distance apart, the equivalent power will always he negative, if the distance is

An object is placed at 20 cm in front of a concave mirror produces three times magnified real image. What is the focal length of the concave mirror?

A concave mirror has a radius of curvature of 35 cm. It is positioned so that the (upright) image of the object is 2.5 times, the size of the object. How far is the mirror from the object?

The diagram below shows a ray of light travelling parallel to the principal axis of a concave spherical mirror. Point F is the principal focus and point C is the centre of curvature. After striking the minor, the ray of light will be reflected through. point

When a student looks into a plane mirror, she sees a virtual image of herself. However, when she looks into a sheet of paper, no such image forms. Which light phenomenon occurs at the surface of the paper?

A concave mirror of focal length f produces a real image n times the size of the object. The distance of the object from the mirror is

A light ray travelling in glass medium is incident on glass-air interface at an angle of incidence θ. The reflected (R) and transmitted (T) intensities, both as function of θ, are platted. The correct sketch is

A car is fitted with a convex side view mirror of focal length 20 cm. A second car 2.8 m behind the first car is overtaking the first car is a relative speed of 15 m/s. The speed of the image of the second car as seen in the mirror of the first one is