1. White light is composed of seven colours if it passes through  blueerect imagegreenindigomagnified imagemagnifying glassmagnifying lensorangeprismReal imageredspectrum of white lightvioletvirtual imageyellow.
2. The seven colours of rainbow are  blueerect imagegreenindigomagnified imagemagnifying glassmagnifying lensorangeprismReal imageredspectrum of white lightvioletvirtual imageyellow,  blueerect imagegreenindigomagnified imagemagnifying glassmagnifying lensorangeprismReal imageredspectrum of white lightvioletvirtual imageyellow,  blueerect imagegreenindigomagnified imagemagnifying glassmagnifying lensorangeprismReal imageredspectrum of white lightvioletvirtual imageyellow,  blueerect imagegreenindigomagnified imagemagnifying glassmagnifying lensorangeprismReal imageredspectrum of white lightvioletvirtual imageyellow,  blueerect imagegreenindigomagnified imagemagnifying glassmagnifying lensorangeprismReal imageredspectrum of white lightvioletvirtual imageyellow,  blueerect imagegreenindigomagnified imagemagnifying glassmagnifying lensorangeprismReal imageredspectrum of white lightvioletvirtual imageyellow and  blueerect imagegreenindigomagnified imagemagnifying glassmagnifying lensorangeprismReal imageredspectrum of white lightvioletvirtual imageyellow
3. The band of seven colours formed on a white screen when a beam of white light is passed through a glass prism is known as  blueerect imagegreenindigomagnified imagemagnifying glassmagnifying lensorangeprismReal imageredspectrum of white lightvioletvirtual imageyellow.
4. If the direction of the image and object are same, then the formed image is called  blueerect imagegreenindigomagnified imagemagnifying glassmagnifying lensorangeprismReal imageredspectrum of white lightvioletvirtual imageyellow
5. If the size of the image is larger than the object it is called  blueerect imagegreenindigomagnified imagemagnifying glassmagnifying lensorangeprismReal imageredspectrum of white lightvioletvirtual imageyellow.
6. Convex lens is also called  blueerect imagegreenindigomagnified imagemagnifying glassmagnifying lensorangeprismReal imageredspectrum of white lightvioletvirtual imageyellow or  blueerect imagegreenindigomagnified imagemagnifying glassmagnifying lensorangeprismReal imageredspectrum of white lightvioletvirtual imageyellow.
7.  blueerect imagegreenindigomagnified imagemagnifying glassmagnifying lensorangeprismReal imageredspectrum of white lightvioletvirtual imageyellow is a transparent glass pyramid, bounded by four triangular surface that separates white light into a spectrum of colours.
8.  blueerect imagegreenindigomagnified imagemagnifying glassmagnifying lensorangeprismReal imageredspectrum of white lightvioletvirtual imageyellow is formed if two or more reflected rays actually meet on the screen.
9. If ray of incident light from a point of source on a mirror or lens, after reflection or refraction, appears to diverge from another point, then the second point is called the  blueerect imagegreenindigomagnified imagemagnifying glassmagnifying lensorangeprismReal imageredspectrum of white lightvioletvirtual imageyellow of the first.
10. An image that cannot be obtained on a screen is called  blueerect imagegreenindigomagnified imagemagnifying glassmagnifying lensorangeprismReal imageredspectrum of white lightvioletvirtual imageyellow