Question

True or False.

1. A diverging lens always forms an upright, virtual, and smaller image.

2. Glasses for nearsighted people have converging lenses, and glasses for farsighted people have diverging lenses.

3. Rainbows are the results of external reflexion of sunlight from the outer surfaces of water droplets in the air.

Answer 1

1. False. A diverging lens may produce a real image of a virtual object. That is, if converging rays are incident on a diverging lens, it is possible for it to produce a real image.

2. False. Nearsighted people are unable to focus distant objects onto their retina. Actually, the rays from object converge before the retina. In order for the image to form on retina, a diverging lens is required. In case of farsighted people, they are unable to focus near object on the retina. The image of object is formed behind the retina. For correction, a converging lens is used which focuses the image on the retina.

3. False. Rainbows are result of refraction, total internal reflection and dispersion of sunlight through small water droplets suspended in air.