Question

Multiple Choice Questions (MCQs)
Tick (V) the correct option.
(a) The process of sending back light rays which fall on the surface of an object is called
(i) reflection
(ii) dispersion
(iii) refraction
(iv) none of these
(b) If the angle between two plane mirrors is 0°, the number of images formed will be
(i) 3
(ii) infinite
(iii) 0
(iv) 5
(c) Regular reflection will take place from a
(i) smooth surface
(ii) polished surface
(iii) plane surface
(iv) all of these
(d) When ciliary muscles relax, the thickness of the lens
(i) decreases
(ii) increases
(iii) can decrease or increase
(iv) remains the same
(e) The perpendicular drawn at any point on a mirror is called
(i) incident ray
(ii) normal
(iii) reflected ray
(iv) all of these
(f) Cones are sensitive to
(i) light
(ii) colour
(iii) both (i) and (ii)
(iv) none of these
New Learnwell Science-VII​

Answer 1

• Tick (V) the correct option.

(a) The process of sending back light rays which fall on the surface of an object is called

(i) reflection ✔

(ii) dispersion

(ii) dispersion(iii) refraction

(ii) dispersion(iii) refraction(iv) none of these

(ii) dispersion(iii) refraction(iv) none of these(b) If the angle between two plane mirrors is 0°, the number of images formed will be

(ii) dispersion(iii) refraction(iv) none of these(b) If the angle between two plane mirrors is 0°, the number of images formed will be(i) 3

(ii) dispersion(iii) refraction(iv) none of these(b) If the angle between two plane mirrors is 0°, the number of images formed will be(i) 3(ii) infinite✔

(iii) 0

(iii) 0(iv) 5

(iii) 0(iv) 5(c) Regular reflection will take place from a

(iii) 0(iv) 5(c) Regular reflection will take place from a(i) smooth surface

(iii) 0(iv) 5(c) Regular reflection will take place from a(i) smooth surface(ii) polished surface

(iii) 0(iv) 5(c) Regular reflection will take place from a(i) smooth surface(ii) polished surface(iii) plane surface✔

(iv) all of these

(iv) all of these(d) When ciliary muscles relax, the thickness of the lens

(iv) all of these(d) When ciliary muscles relax, the thickness of the lens(i) decreases

(iv) all of these(d) When ciliary muscles relax, the thickness of the lens(i) decreases(ii) increases✔

(iii) can decrease or increase

(iii) can decrease or increase(iv) remains the same

(iii) can decrease or increase(iv) remains the same(e) The perpendicular drawn at any point on a mirror is called

(iii) can decrease or increase(iv) remains the same(e) The perpendicular drawn at any point on a mirror is called(i) incident ray

(iii) can decrease or increase(iv) remains the same(e) The perpendicular drawn at any point on a mirror is called(i) incident ray(ii) normal✔

(iii) reflected ray

(iii) reflected ray(iv) all of these

(iii) reflected ray(iv) all of these(f) Cones are sensitive to

(iii) reflected ray(iv) all of these(f) Cones are sensitive to(i) light✔

(ii) colour

(ii) colour(iii) both (i) and (ii)

(ii) colour(iii) both (i) and (ii)(iv) none of these

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Answer 2

The process of sending back light rays which fall on the surface of an object is called (i) reflection (ii) dispersion ... (iii ) reflected ray (iv) all of these (f) Cones are ...

The process of sending back the light rays which fall on the surface of an object, is called the reflection of light. ... According to the first law of reflection of light, the incidence ray, and the .

Explanation:

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