Geometrical Optics Test 01

Total Questions: 20

1 - Which of the following quantities is not change during refraction of light?

A ) its direction
B ) its speed
C ) its frequency ✅
D ) its wavelength

3 - An object is placed at the center of curvature of a concave mirror. The image produced by the mirror is located:

A ) out beyond the center of curvature
B ) at the center of curvature ✅
C ) between the center of curvature and the focal point
D ) at the focal point

5 - The index of refraction depends on:

A ) The focal length
B ) The speed of light ✅
C ) The image distance
D ) The object distance

6 - Which type of image is formed by a convex lens on a screen?

A ) Inverted and real ✅
B ) Inverted and virtual
C ) upright and real
D ) upright and vertual

7 - Which type of images is produced by the converging lens of human eyes if it views are distant object?

A ) Real, ertect, same size
B ) Real, inverted, diminished ✅
C ) virtual, erect, diminished
D ) virtual, inverted, magnified

8 - Image formad on a camera is:

A ) Real, inverted, and diminished ✅
B ) virtual, upright and diminished
C ) Virtual, upright and magnified
D ) Real , inverted and magnified

9 - If a ray of light in glass is incident on an air surface at an angel array greater than the critical angle, the ray will:

A ) refract only
B ) reflect only ✅
C ) partially refract and partially reflect
D ) different only

11 - The diameter of spherical mirror is called:

A ) curvature
B ) aperture ✅
C ) sphere
D ) both a and b

13 - Half of redius of curvature is called:

A ) focal length ✅
B ) Principal foces
C ) axis
D ) aperture

15 - The distance between principal foces and Pole of mirror is called:

A ) Principal focus
B ) focal length ✅
C ) Aperture
D ) image

16 - The mirror whose inner curved surface is reflecting is called:

A ) concave mirror ✅
B ) convex mirror
C ) mirror
D ) lens

17 - The mirror whose outer curved surface is reflecting is called:

A ) concave mirror
B ) Convex mirror
C ) lens
D ) mirror

19 - The ray of light after reflection from concave mirror passes through:

A ) centre
B ) Principal focus ✅
C ) Pole
D ) redius of curvature

20 - Spherical mirrors are used in:

A ) medical
B ) Search light
C ) microscope
D ) all of these ✅