The splitting of different colours of light in a prism is :
1). Reflection of light
2). Dispersion of light
3). Diffraction of light
4). Refraction of light
1. The focal length of a concave mirror with a radius of curvature of 20.0 cm is :
2. Why the needle of iron swims on Water surface when it is kept gently ?
3. The oldest type of energy known to man is
4. Magnetism in materials is due to
5. It is dangerous to observe Solar eclipse with naked eyes because
6. A photostat machine works on
7. Earth is also known as _______.
8. Which best describes how air moves during convection?
10. The mass of a star is two times the mass of the Sun. How it will come to an end ?