Spherical Mirror

Q.

What is a spherical mirror ? Distinguish between a concave mirror and a convex mirror.

Q. Define aperture of a spherical mirror.

Q.

How to find the nature of the image formed ( I'm all cases ) ?

Q.

Define concave mirror.

Q.

Name the two types of spherical mirrors. What type of mirror is represented by the : (a) back side of a shining steel spoon ? (b) front side of a shining steel spoon ?

Q.

Why is the convex mirror called the diverging mirror?

Q.

Why us concave mirror know as converging mirror

Q.

Information about history of spherical mirrors in human civilization

Q.

Define convex mirror.

Q. If the ratio of focal length and image distance for concave mirror is positive then

1. Image is formed in front of the mirror and is inverted
2. Image is erect
3. Image is virtual
4. None of these

Q.

Which image is formed by a concave mirror, plane mirror, and convex mirror?

Q.

A communications satellite in orbit sends a parallel beam of signals down to earth. If these signals obey the same laws of reflection as light and are to be focussed onto a small receiving aerial, what should be the best shape of the metal 'dish' used to collect them ?

Q.

A concave mirror always forms erect and diminished images.

1. True
2. False

Q.

An object is placed at 10 cm from a convex mirror of focal length 10 cm. Find the position of the image

Q. The relation between intensity (I) of image formed by a spherical mirror and area of aperture (A) is

1. I ∝ A
2. $I\propto A^2$
3. $I\propto \frac{1}{A}$
4. $I\propto \frac{1}{A^2}$

Q.

What is the focal length of a spherical mirror?

Q. A concave mirror is a ___ whose reflecting surface is towards the center of the sphere of which the mirror is a part.

1. convex mirror
2. plane mirror
3. spherical mirror
4. concave mirror

Q.

The focal length f is related to the radius of curvature r of the spherical convex mirror by:

1. $f=r$

2. $f=-\frac{1}{2}r$

3. $f=+\frac{1}{2}$$r$

4. $f=-r$

Q. Derive of mirror formula and lenses formula.

Q. A person standing in front of a mirror finds his image erect and larger than himself. This implies that the mirror is ___.

1. concave
2. cylindrical with bulging side outwards
3. plane
4. convex

Q.

Sunlight is incident on a solar cooker and gets focused at a​distance of 10 cm from the pole of the concave mirror.​ What is the radius of curvature of the mirror?​

1. 40 cm​
2. 10 cm​
3. 5 cm​
4. 20 cm​

Q.

How to identify concave mirror

Q. Convex mirrors are silver-coated over the outer surface.

1. True
2. False

Q. The relation between focal length F and radius of curvature R of a spherical mirror of small aperture is given by

1. $F=\frac{R}{2}$
2. F = 2R
3. $F=\frac{R}{4}$
4. F = R

Q. Choose the formula of magnification for spherical mirrors.

1. -u/v
2. v/u
3. u/v
4. -v/u

Q. The focal length of a concave mirror is $20cm$. Determine where an object must be placed to form an image magnified two times when the image is real

1. $30cm$ from the mirror
2. $20cm$ from the mirror
3. $10cm$ from the mirror
4. $15cm$ from the mirror

Q. A person stands in front of a mirror his head appears to be diminished and his body appears in normal size but his legs appears to be enlarged. Wt might be the reason behind this? Wt ar the mirrors used?

Q.

Which of the following relations is true for focal length (f) and the radius of curvature (r)?

1. f = 2r

2. f = r/2

3. f = r/2 + 1

4. f = r + 2

Q.

Write the relationship among the object distance (u), image distance (v), and the focal length (f) of a (ii) Spherical mirror.

Q.

The reflecting surface of a spherical mirror may be curved ____ or _____