The speed of light is maximum in ______.
- Avacuum
- Bglass
- Cdiamond
163 questions across 9 question groups — pick any mix to generate a Science paper with step-by-step answer keys.
MCQ
45 Q→02Assertion (A) & Reason (B) MCQ
8 Q→03[2 Mark Questions]
56 Q→04Match The Following.
5 Q→05[4 Mark Questions]
2 Q→06[7 marks Questions]
6 Q→07Fill In The Blanks.
10 Q→08[ 1 mark questions ]
8 Q→09true or false.[1 Mark each]
23 Q→One sample from each question group in this chapter. Select any group above to see the full set with answer keys.
Answer: D.
View full solution →Answer: C.
View full solution →What do you conclude about the speed of light in diamond. if the refractive index of diamond is 2.41?
Rear-view mirror, Dentist’s mirror, Torchlight mirror, Mirrors in shopping malls, Make-up mirror.
| 1. | Ratio of height of image to height of object. | Concave mirror |
| 2. | Used in hairpin bends in mountains. | Total internal reflection |
| 3. | Coin inside water appearing slightly raised. | Magnification |
| 4. | Mirage | Convex mirror |
| 5. | Used as Dentist’s mirror. | Refraction |
| S.No. | Position of object | Position of image | Size and nature of image |
| 1 | Within focus | a) Between F and C | A) Magnified, Real, inverted |
| 2 | At focus F | b) At C | B) Magnified, virtual, erect |
| 3 | Between F and C | c) Behind the mirror | C) Diminished, Real, inverted |
| 4 | At C | d) Infinity | D) Highly Diminished, Real, inverted |
| 5 | Beyond C | e) At F | E) Highly Magnified, Real, inverted |
| 6 | At infinity | f) Beyond C | F) Same size, Real, inverted |
| Column I | Column II |
| (i) plane mirror | (a) Focal length is positive. |
| (ii) concave | (b) Focal length is negative. |
| (iii) convex | (c) Focal length is infinity. |
| (iv) Real image | (d) Magnification if positive value. |
| (v) Virtual image | (e) Magnification if negative value. |
| Column I | Column II |
| (i) r > 90 | (a) Light gazes the surface of separation between two mode. |
| (ii) r = 90 | (b) No refraction. |
| (iii) r < 90 | (c) Refracted ray away from the normal |
| Column I | Column II |
| (i) A plane mirror | (a) Image is erect & smaller in size than the object. |
| (ii) A concave mirror | (b) Image is erect & of the same size as of the object. |
| (iii) A convex | (c) Used by dentists to see an enlarged images of teeth. |
| (d) Can form images of objects spread over a large area. |
When a ray of light passes from air into glass, is the angle of refraction greater than or less than the angle of incidence?
Light ray emerges from water into air. Draw a ray diagram indicating the change in its path in water.
b) Mention the position and nature of image in each case.
The reason for brilliance of diamonds is total internal reflection of light.
True
False
When an object is at the centre of curvature of concave mirror the image formed will be virtual and erect.
True
False
The convex mirror always produces a virtual, diminished and erect image of the object.
True
False
If a ray of light passes obliquely from one medium to another, it does not suffer any deviation.
True
False
The angle of deviation depends on the refractive index of the glass.
True
False
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