anyone provide with me 10 mcqs question with answer of reflection of light with answers of class 10th level mark as brainliest
Answers
Answer:
1. Focal length of plane mirror is
a. At infinity
b. Zero
c. Negative
d. None of these
2. Image formed by plane mirror is
a. Real and erect
b. Real and inverted
c. Virtual and erect
d. Virtual and inverted
3. A concave mirror gives real, inverted and same size image if the object is placed
a. At F
b. At infinity
c. At C
d. Beyond C
4. Power of the lens is -40, its focal length is
a. 4m
b. -40m
c. -0.25m
d. -25m
5. A concave mirror gives virtual, refract and enlarged image of the object but image of smaller size than the size of the object is
a. At infinity
b. Between F and C
c. Between P and F
d. At E
6. In optics an object which has higher refractive index is called
a. Optically rarer
b. Optically denser
c. Optical density
d. Refractive index
7. The optical phenomena, twinkling of stars, is due to
a. Atmospheric reflection
b. Total reflection
c. Atmospheric refraction
d. Total refraction
8. Convex lens focus a real, point sized image at focus, the object is placed
a. At focus
b. Between F and 2F
c. At infinity
d. At 2F
9. The unit of power of lens is
a. Metre
b. Centimeter
c. Diopter
d. M-1
10. The radius of curvature of a mirror is 20cm the focal length is
a. 20cm
b. 10cm
c. 40cm
d. 5cm
Answers
1. A
2. C
3. C
4. C
5. C
6. B
7. C
8. C
9. C
10. B
Plz mark it as brainliest
Answer:Light Reflection and Refraction Class 10 MCQ With Answers Pdf Question 1. An object is placed at a distance of 0.25 m
in front of a plane mirror. The distance between the object and image will be
(a) 0.25 m
(b) 1.0 m
(c) 0.5 m
(d) 0.125 m
Answer/Explanation
Answer: c
Explanation:
(c) Distance between object and image = 0.25 + 0.25 = 0.5 m
MCQ On Light Class 10 Question 2. The angle of incidence for a ray of light having zero reflection angle is
(a) 0
(b) 30°
(c) 45°
(d) 90°
Answer/Explanation
Answer: a
Explanation:
(a) For reflecting surface ∠i = ∠r
MCQ Questions On Light Class 10 Question 3. For a real object, which of the following can produce a real image?
(a) Plane mirror
(b) Concave mirror
(c) Concave lens
(d) Convex mirror
Answer/Explanation
Answer: b
Explanation:
(b) Only concave mirror can produces a real image for the any position of object between its focus and infinity.
MCQ On Reflection Of Light Class 10 Question 4. Which of the following mirror is used by a dentist to examine a small cavity?
(a) Convex mirror
(b) Plane mirror
(c) Concave mirror
(d) Combination of convex and concave mirror
Answer/Explanation
Answer: c
Explanation:
(c) Concave mirror forms erect and enlarged image when held close to the cavity.
MCQ On Reflection And Refraction Of Light With Answers Pdf Question 5. An object at a distance of 30 cm from a
concave mirror gets its image at the same point. The focal length of the mirror is
(a) – 30 cm
(b) 30 cm
(c) – 15 cm
(d) +15 cm
Answer/Explanation
Answer: c
Explanation:
(c) When object is placed at 2F, the image formed by concave mirror is also at 2F.
So 2F = -30 or F = -15 cm.
Light Class 10 MCQ With Answers Question 6. An object at a distance of + 15 cm is slowly moved towards the pole of a convex mirror. The image will get
(a) shortened and real
(b) enlarged and real
(c) enlarge and virtual
(d) diminished and virtual
Answer/Explanation
Answer: d
Explanation:
(d) Convex mirror always formed virtual and diminished image.
MCQ Of Chapter Light Class 10 Question 7. A concave mirror of radius 30 cm is placed in water. It’s focal length in air and water differ by
(a) 15
(b) 20
(c) 30
(d) 0
Answer/Explanation
Answer: d
Explanation:
(d) The focal length of spherical mirror does not depends on the surrounding medium.
Reflection And Refraction Questions And Answers Question 8. A concave mirror of focal length 20 cm forms an image having twice the size of object. For the virtual position of object, the position of object will be at
(a) 25 cm
(b) 40 cm
(c) 10 cm
(d) At infinity
Answer/Explanation
Answer: c
Explanation:
(c) For virtual image,
MCQ Questions for Class 10 Science Light Reflection and Refraction with Answers 8
Multiple Choice Questions On Light Reflection And Refraction Question 9. The image formed by concave mirror is real, inverted and of the same size as that of the object. The position of object should be
(a) at the focus
(b) at the centre of curvature
(c) between focus and centre of curvature
(d) beyond centre of curvature
Answer/Explanation
Answer: c
Explanation:
(c) When object lies at C of a concave mirror, image is also formed at ‘C’ and having same size real and inverted.
Multiple Choice Questions On Light Class 10 Question 10. The nature of the image formed by concave mirror when the object is placed between the focus (F) and centre of curvature (C) of the mirror observed by us is
(a) real, inverted and diminished
(b) virtual, erect and smaller in size
(c) real, inverted and enlarged
(d) virtual, upright and enlarged
Answer/Explanation
Answer:
Explanation:
(c) When object lies between C and F, the real, inverted and enlarged image is formed beyondC.
Explanation: