Chapter 6: Geometrical Optics Physics Mcqs for High School - Grade 10 - Set 3

1)   The focus of the convex mirror is

a. negative
b. virtual
c. real
d. zero
Answer  Explanation 

ANSWER: negative

Explanation:
No explanation is available for this question!


2)   In a compound microscope, the focal length of the objective lens is

a. short
b. large
c. zero
d. none of above
Answer  Explanation 

ANSWER: short

Explanation:
No explanation is available for this question!


3)   Concave mirrors are also called

a. convex mirrors
b. converging mirrors
c. plane mirrors
d. focal mirrors
Answer  Explanation 

ANSWER: converging mirrors

Explanation:
No explanation is available for this question!


4)   When a ray of light strikes a face of prism perpendicularly, it enters the prism without deviation and strikes the hypotenuse at an angle of

a. 30 °
b. 45 °
c. 90 °
d. 60 °
Answer  Explanation 

ANSWER: 45 °

Explanation:
No explanation is available for this question!


5)   The human eye acts like a

a. endoscope
b. camera
c. telescope
d. microscope
Answer  Explanation 

ANSWER: camera

Explanation:
No explanation is available for this question!


6)   The focus is in front of the mirror in

a. plane mirror
b. convex mirror
c. concave mirror
d. silver mirror
Answer  Explanation 

ANSWER: concave mirror

Explanation:
No explanation is available for this question!


7)   The speed of light in air is approximately

a. 3.0 × 10⁸ m s-¹
b. 4.0 × 10⁸ m s-¹
c. 3.0 × 10⁵ m s-¹
d. 5.0 × 10⁸ m s-¹
Answer  Explanation 

ANSWER: 3.0 × 10⁸ m s-¹

Explanation:
No explanation is available for this question!


8)   The lens which diverges light from a single point is

a. concave lens
b. convex lens
c. biconvex lens
d. all of above
Answer  Explanation 

ANSWER: concave lens

Explanation:
No explanation is available for this question!


9)   Reflection by smooth surfaces is called

a. irregular reflection
b. refraction
c. regular reflection
d. reflection
Answer  Explanation 

ANSWER: regular reflection

Explanation:
No explanation is available for this question!


10)   The line passing through the two centers of curvatures of the lens is called

a. principal axis
b. optical center
c. principal focus
d. focal length
Answer  Explanation 

ANSWER: principal axis

Explanation:
No explanation is available for this question!


11)   The lens which causes incident parallel rays of light to diverge at a point is called

a. convex lens
b. concave lens
c. counter lens
d. fiber lens
Answer  Explanation 

ANSWER: concave lens

Explanation:
No explanation is available for this question!


12)   A magnifying glass forms

a. real image
b. inverted image
c. virtual image
d. fake image
Answer  Explanation 

ANSWER: virtual image

Explanation:
No explanation is available for this question!


13)   The endoscope used to examine the throat is called

a. cystoscope
b. gastroscope
c. microscope
d. bronchoscope
Answer  Explanation 

ANSWER: bronchoscope

Explanation:
No explanation is available for this question!


14)   A spherical mirror whose inner curved surface is reflecting is called

a. plane mirror
b. convex mirror
c. concave mirror
d. silver mirror
Answer  Explanation 

ANSWER: concave mirror

Explanation:
No explanation is available for this question!


15)   A compound microscope uses

a. 2 lenses
b. 1 lens
c. 4 lenses
d. 5 lenses
Answer  Explanation 

ANSWER: 2 lenses

Explanation:
No explanation is available for this question!


16)   The speed of light in glass is approximately

a. 3.0 × 10⁸ m s-¹
b. 2.3 × 10⁸ m s-¹
c. 2.0 × 10⁸ m s-¹
d. 2.6 × 10⁵ m s-¹
Answer  Explanation 

ANSWER: 2.0 × 10⁸ m s-¹

Explanation:
No explanation is available for this question!


17)   The angle of reflection and the angle of reflection are

a. both negative
b. not equal
c. equal
d. opposite
Answer  Explanation 

ANSWER: equal

Explanation:
No explanation is available for this question!


18)   The speed of light in water is approximately

a. 2.3 × 10⁸ m s-¹
b. 3.3 × 10⁸ m s-¹
c. 2.3 × 10⁵ m s-¹
d. 4.3 × 10⁸ m s-¹
Answer  Explanation 

ANSWER: 2.3 × 10⁸ m s-¹

Explanation:
No explanation is available for this question!


19)   The inner part of the fiber optics which carries light is called

a. prism
b. cladding
c. core
d. diopters
Answer  Explanation 

ANSWER: core

Explanation:
No explanation is available for this question!


20)   An object 12 cm in front of a convex mirror forms an image 6 cm behind the mirror. The focal length of the mirror is

a. −10 cm
b. −14 cm
c. −12 cm
d. −15 cm
Answer  Explanation 

ANSWER: −12 cm

Explanation:
No explanation is available for this question!