What is the plant shown in the figure ? What is made of it ?

What is bone made of ?

Name the marked parts in the figure. What is the mehtod used in the figure ? What is the use of it ?

What is the man doing in the figure ? What is in his hand ?

What is done by the apparatus shown in the figure?

What is name of the bone shown in the figure? Write abotu it.

What are the bones shown in the figure ? Write about them.

(a) Figure 9.32 shows a cross-section of a 'light pipe' made of a glass fibre of refractive index 1.68. The outer covering of the pipe is made of a material of refractive index 1.44. What is the range of the angles of the incident rays with the axis of the pipe for which total reflections inside the pipe take place, as shown in the figure. (b) What is the answer if there is no outer covering of the pipe?

What is soil made up of?