Explain the construction of Galileo's telescope.

Answer the following question: Explain the construction of a radio telescope.

Explain the construction of a radio telescope.

What is a calorimeter? What isits use? OR Explain the construction of a calorimeter.

Answer the following : Explain the construction of biogas.

What is LED? With neat diagram, explain the construction of a LED.

Explain the construction of photoelectric cell and state its applications.

Answer the following : Explain the construction of a calorimeter . Draw the necessary figure .

Explain the construction of plane spherical wavefront on the basis of Huygen's principle.

Answer the following questions : Explain the construction and working of an electric motor. Draw a neat diagram and label it.

Explain the working of an astronomical telescope using refraction of light.