A double convex lens has two surfaces of equal radii \(R\) and refractive index \(m=1.5.\) We have:
1. \(f=R/2\)
2. \(f=R \)
3. \(f=-R\)
4. \(f=2R\)
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA symmetric double convex lens is cut in two equal parts by a plane perpendicular to the principal axis. If the power of the original lens was 4 D, the power of a cut-lens will be
1. 2 D
2. 3 D
3. 4 D
4. 5 D
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA thin lens is made with a material having refractive index \(\mu=1.5\). Both sides are convex. It is dipped in water (\(\mu=1.33\)). It will behave like:
1. a convergent lens
2. a divergent lens
3. a rectangular slab
4. a prism
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA convex lens is made of a material having refractive index \(1.2.\) Both the surfaces of the lens are convex. If it is dipped into water (\(\mu=1.33 \) ), it will behave like:
1. | a convergent lens | 2. | a divergent lens |
3. | a rectangular slab | 4. | a prism |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology