Question

1. A spherical lens converges rays

a) more than a semi-sphere b) same as the hemisphere c0 less than the hemisphere d) none

2. For the hemisphere (curved side facing the incident light), the convergence of the rays, as the index of refraction increases from air to glass.

a) increases b) decreases c) none d) no change

3. For the concave object (curved side facing the incident light), the divergence of the rays, as the index of refraction increases from air to water

a) increases b) no change c) decreases d) none

4. What could be an observation if an object is placed in the focal length?

a) the image is formed at infinity b) none c) the image is formed between f and 2f d) the image is formed at the focal point on the other side

5) What could be an observation if an object is placed between f and 2f?

a) it is bigger than the object b) none c) it is smaller than the object d) real, inverted, and no magnification

Answer 1