An illuminated object

What are illuminated objects?

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

A student wishes to study the cell structure under a light microscope having 10X eyepece and 45 X objective. He should illuminate the object by which one of the following colours of light so as to get the best possible resolution

An illuminated point object O is kept 20 cm from a thin convex lens L_(1) of focal length 15 cm as shown below. A thin diverging lens L_(2) of focal length 25 cm is kept co - axial with the first lens and 35 cm from it, as shown in figure below : Find the position of the final image formed by this combination of lenses.

An illuminated plant is provided with 0.03 % CO_(2) . The plant will

Which of the follwing would happen if the supply of O_(2) is decreased to an illuminated wheat plant

If the red light is replaced by blue light illuminating the object in a microscope the resolving power of the microscope

n identical bulbs are connected in series and illuminated by a power supply . One of the bulbs gets fused. The fused bulb is removed , and the remaining bulbs are again illuminated by the same power supply. Find the fractional change in the illuminated of (a) all the bulbs and (b) one bulb.

Draw the circuit diagram of an illuminated photodiode in reverse bias? How is photodiode used to measure light intensity?

A metal surface is illuminated by the protons of energy 5 eV and 2.5 eV respectively . The ratio of their wavelength is