Consider a concave mirror with a focal point 15.0 cm from the mirror. If a virtu

Question

Consider a concave mirror with a focal point 15.0 cm from the mirror. If a virtual image is formed 10.0 cm along the principal axis from the mirror, how far is the object from the mirror? 10.0 cm 6. 00 cm 1.00 cm 30.0 cm When an image u formed by a convex mirror, the image will Always be real. Always be larger. May be either real or virtual. Always he virtual. If an object is placed between a concave lens and its focal point, what best describes the image? Real, inverted, name sire Real, inverted, enlarged Virtual, upright, reduced Real, inverted, reduced Virtual, upright, enlarged A lens is used in a movie projector to form a greatly magnified image on a large screen. Which of the following must be true? The image distance equals the object distance. The image is real and inverted The image is virtual and upright The image is virtual and inverted The image is real and uptight Which of the following mirrors can produce a virtual, inverted image? Convex only Concave only Convex and Concave Plane only None of the above When green and blue light shine on a while sheet, the resulting color is____yellow, green cyan. Magenta. blue.

Explanation / Answer

1. for concave mirror:

f = 15 cm

image distance, di = - 10cm

using mirror equation,

1/f = 1/di + 1/do

1/15 = 1 /(-10) + 1/do

do = 6 cm

ANs(B)

2. by convex mirror, image is always virtual and uprighty.

Ans(D)

3. this is same case as question 1.

d0 = 6

di = -10

m = - di / do = - ( -10/6) = 1.67

virtual, upright (magnification is +ve) , en;arged ( m > 1)

Ans(E)

4. image is formed on screen so image is real.

and enlarged.

5. virtual image is always upright for single mirror.

hence it can be obtained using convex and concave mirror.

Ans(C)

6. cyan

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