Q- What part of second is called nanosecond-One hundredth-One billionth-One millionth-One Thousandth- nbsp-Q- - is the phenomenon by which incident ray of light is sent back to same medium after falling on a smooth surface-A- Refraction nbsp-C- Dispersion nbsp-B-Reflection nbsp-D- Alomization-Q- -image is formed by a pinhole camera-Irregular-Erected-Inverted-None of these-Q- Read the statements and choose the correct option- nbsp-1- Moon is a luminous sources of light-2- A glow worm is a natural source of light-A- only i is true-B- only ii is true-C- Both are true nbsp-D- Both are false- nbsp-

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Standard VII

Physics

Reflection

Q. What part ...

Question

Q. What part of second is called nanosecond?

One hundredth

One billionth

One millionth

One Thousandth

Q. _____ is the phenomenon by which incident ray of light is sent back to same medium after falling on a smooth surface.
(A) Refraction
(C) Dispersion
(B)Reflection
(D) Alomization
Q. _image is formed by a pinhole camera.

Irregular

Erected

Inverted

None of these

Q. Read the statements and choose the correct option.
1. Moon is a luminous sources of light.
2. A glow worm is a natural source of light.

A. only i is true
B. only ii is true
C. Both are true
D. Both are false

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Solution

Dear Student,
No
Answers are
33. (C)-12
34. ( B)
35- Total internal reflection
36.(D)
Regard

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Similar questions

Consider two statements A and B given below : A : real image is always inverted B : virtual image is always erect Out of these two statements : (a) only A is true (b) only B is true (c) both A and B are true (d) none is true

Q. Statement I : Rays incident on a convex mirror from a point source of light, after reflection diverge.
Statement II : A convex mirror can never form a real image for a point source of light.

Q. State whether the following statements are true or false. Rewrite the false statements correctly.
(a) The laws of reflection hold good only for plane mirrors and not for spherical mirrors.
(b) The radius of curvature is double the focal length of a concave mirror.
(c) A ray passing through the focus cuts through the principal axis of a concave mirror after reflection.
(d) When an object is placed between a concave mirror and its focus, the image formed is virtual, erect and larger than the object.
(e) The image formed on a cinema screen is virtual.
(f) A convex mirror is used by stage artists.
(g) A convex mirror always gives real images.
(h) A pinhole camera gives a real image.
(i) A convex surface bulges inwards.
(j) Incident rays parallel to the principal axis of a curved mirror pass through the focus after reflection.
(k) A concave mirror always forms a real image.
(l) There can be many reflected rays for a single incident ray falling on a reflecting surface.

Q. Choose an appropriate word and fill in the blanks.
(a) A ........... is a natural source of light.
(b) A ......... is an artificial source of light.
(c) When light passes through a prism, it gets separated into ....... colours.
(d) The image obtained in the pinhole camera is ......... .
(e) A shadow is formed when an ........... object comes in the way of light.
(f) When a ........... object comes in the way of light, light passes ......... it.
(options : seven, star, through, transparent, opaque, colors, shape, erect, inverted, luminous, candle)

The phenomenon by which the incident light falling on a surface is sent back into the same medium is known as ___.

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Dear Student, No Answers are 33. (C)-12 34. ( B) 35- Total internal reflection 36.(D) Regard

Dear Student,
No
Answers are
33. (C)-12
34. ( B)
35- Total internal reflection
36.(D)
Regard