A luminous object

A microscope is used to resolve two self luminous objects separated by a distance of 5 xx 10^(-5)cm and placed in air. What should be the minimum magnifying power of the microscope in order to see the resolved images of the objects? The resolving power of the eye is 1.5 and teh least distance of distinct vision is 25 cm.

A point luminous object (O) is at a distance h from front face of a glass slab of width d and of refractive index mu . On the back face of slab is a reflecting plane mirror. An observer sees the image of object in mirror as shown in figure. Distance of image from front face as seen by observer will be

Give two examples of Luminous objects

Categorize the objects shown above as luminous and non-luminous objects.

Give two examples of Non-luminous objects

A luminous point object is placed at O, whose image is formed at I as shown in Figure. Line AB is optical axis. Which of the following statement is // are correct?

A luminous point object is moving along the principal axis of a concave mirror of focal length 12 cm towards it. When its distance from the mirror is 20 cm its velocity is 4 cm/s. the velocity of the image in cm/s at that instant is

A convex lens of focal length 40cm is held at a distance 12cm coaxially above a concave mirror of focale length 18cm. Q. A luminous point object placed d cm above the lens on its axis gives rise to an imag coincident iwth itself, then the value of d is equal to

A cubical block of glass, refractive index 1.5, has a spherical cavity of radius r=9cm inside it as shown in figure . A luminous point object O is at a distance of 18cm from the cube. What is the apparent position of O as seen from A?

One side of radius of curvature R_2=120 cm of a convexo-convex lens of material of refractive index mu=1.5 and focal length f_1=40 cm is slivered. It is placed on a horizontal surface with silvered surface in contact with it. Another convex lens of focal length f_2=20 cm is fixed coaxially d=10 cm above the first lens. A luminous point object O on the axis gives rise to an image coincide with it. Find its height above the upper lens.