MCQ
A person cannot see distant objects clearly. His vision can be corrected by using the spectacles containing:
- AConcave lenses.
- BPlane lenses.
- CContact lenses.
- DConvex lenses.
Explanation:
Concave lenses are used to correct the defect of vision and enable the person to see distant objects clearly.
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| S. No. | $\angle\text{ i}$ | $\angle\text{ i}$ | $\angle\theta$ |
| I | $30^{0}$ | $20^{0}$ | $31^{0}$ |
| II | $40^{0}$ | $25^{0}$ | $40^{0}$ |
| III | $50^{0}$ | $31^{0}$ | $49^{0}$ |