QUIZ ON OPTICS : MCQ ON RAY OPTICS PART-1

 

1/12

Focal length of a plane mirror is

(a)At infinity

(b) Zero

(c) negative

(d) none of these

2/12

Image formed by a convex spherical mirror is

(a) Virtual

(b) real

(c) enlarged

(d) inverted

3/12

A plane mirror produces a magnification of

(a) -1

(b) +1

(c) Zero

(d) between zero and infinity

4/12

(iv) When a ray of light enters a glass slab then

(a) Its frequency and velocity change

(b)Only frequency change

(c) Frequency and wavelength change

(d)Its frequency does not change

5/12

(v)The colour of light which is deviated the least by a prism in the spectrum of light is

(a) red

(b) green

(c) violet

(d) yellow

6/12

(i)Speed of light is maximum in ...

air

vacuum

water

None of these

7/12

The mirror used as a shaving glass is

a. convex mirror

b. plane mirror

c. concave mirror

d. parabolic mirror

8/12

The focal length of lens of power 2 D is

a. 50 cm

b. 1.25 cm

c. 47 cm

d. 25 cm

9/12

The image of real object as seen through a convex mirror is

a. real

b. enlarged

c. virtual

d. none of the above

10/12

The size of image formed by a convex mirror is

a. diminished

b. magnified

c. same size

d. none of the above

11/12

Image formed by a convex mirror is

a. real and inverted

b. real and erect

c. virtual and inverted

d. virtual and erect

12/12

When light enters a glass what happens to the wavelength

a. decreases

b. Increases

c. remains constant

d. either b or c

Result: