The chloroplast is an organelle, having chlorophyll pigments in them. These pigments trap light energy to support photosynthetic reaction.
Chloroplasts are found only in plant cells
Chloroplast is specific to plant cell because plants are the autotrophs which can prepare their food by conversion of light energy to chemical energy. It is the vital photosynthetic pigment in leaves as it involves the conversion of light energy into chemical energy. It absorbs all the radiations of variant colours like violet, blue, orange and red. But, it reflects the green light and hence the leaves appear green in colour. It absorbs the solar energy varying from the wavelength around 430nm (blue) to 662nm (red). Other than plants these are also present in some other organisms like bacteria and green algae.