1) An object is placed in front of a converging lens, at a distance LESS than th

Question

1) An object is placed in front of a converging lens, at a distance LESS than the focal length f. Which one of these statements concerning the image distance is TRUE?

Select one:

a. The image distance is equal to the focal length of the lens

b. The image distance is greater than the focal length of the lens

c. The image distance is less than the focal length of the lens.

2)If a ray is incident on an interface from a high refractive index material to a low refractive index material, at the critical angle, which of the following statements are true? (Check all that apply)

Select one or more:

a. The angle of refraction is 90 degrees to the normal

b. There is no transmission

c. There is total internal reflection

d. The angle of reflection is 90 degrees to the normal

e. There is no reflection, only refraction

c) A sharp image is located 78.7 mm behind a converging lens which has 64.7 mm focal length. What is the object distance (in mm)? Give your answer to 3 sf.

Explanation / Answer

1) An object is placed in front of a converging lens, at a distance LESS than the focal length f then The image distance is greater than the focal length of the lens.

The image is formed on the same side of the object.The image is virtual ,erect and magnified.

(2).If a ray is incident on an interface from a high refractive index material to a low refractive index material, at the critical angle,then the angle of refraction is 90 degrees to the normal

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