The next three questions are about the following situation: A mirror is made by

Question

The next three questions are about the following situation:

A mirror is made by spraying reflecting paint on the inside of a portion of the surface of a sphere as shown below. The location of the center of the sphere is indicated. An image (either real or virtual) of the object shown may be formed by the mirror. (Regions II and III have the same length.)

1)  The image is located in region:

I

II

III

IV

2)  The image is:

upright

inverted

3)  The image is:

real

virtual

The diagram shows the passage of a ray of light from air into a substance X. Take the refractive index of air to be 1.0.

4)  The index of refraction of material X is:

1.15

1.29

1.65

2.23

The two lenses shown are illuminated by a beam of parallel light from the left.

5)  The beam emerging from lens B is

parallel

diverging

converging

Explanation / Answer

(1)

When the object is placed between the focal point and the center of the curvature (double of the focal length), the image forms beyond the center of the curvature, the image is real, inverted and magnified.

I is answer

(2)

inverted

(3)

real

(4)

use the Snell's law,

n1*sini=n2*sinr

n2 = [n1*sini]/ (sinr) = (1.0)*sin40 / (sin30) =1.29

Related Questions

Navigate

• Browse (All)
• Browse T
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.