Light Reflectio...

The image of an object placed in front of a concave mirror of focal length 12 cm is formed at a point which is 10 cm more distant from the mirror than the object. The magnification of the image is:

An object is situated at a distance of 15cm from a convex lens of focal length 30 cm. The position of the image formed by it will be 

A plane mirror reflects a beam of light to form a real image. The incident beam is :

In the case of refraction of light :
a) Frequency changes
b) Speed changes
c) Wavelength changes

The focal length of a spherical mirror is:

An object is placed at a distance $$2 f$$ from the pole of a convex mirror of focal length $$f$$ . The linear magnification is:

The line PO is called the _______.

The line OQ is called the :

It is desired to photograph the image of an object placed at a distance of $$3$$ m from a plane mirror. The camera, which is at a distance of $$4.5$$ m from the mirror should be focused for a distance of :

An object $$5$$ cm tall is placed $$1$$ m from a concave spherical mirror which has a radius of curvature of $$20$$ cm. The size of the image is: