A Lens Is Made of Glass of Refractive Index 1

question 106

Multiple Choice

A lens is made of glass of refractive index 1.50. If both the surfaces are convex and the radii of curvatures are 10 cm and 20 cm, then the focal length of this lens is

• A) 4.45 cm.
• B) 13.3 cm.
• C) -13.3 cm.
• D) 40 cm.
• E) -40 cm.

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Definitions:

Leaf Litter

The layer of dead leaves and plant material on the ground in forests and wooded areas, important for nutrient cycling and habitat for many organisms.

Dead Organisms

Refers to organisms that have ceased all biological functions that sustain life.

Feces

Waste matter discharged from the intestines through the anus; composed of undigested food, bacteria, and cells from the lining of the intestines.

Stomata

Small pores located on the surface of leaves and stems, enabling the exchange of gases between the plant and the surrounding atmosphere.