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 the 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