Science Class 6th
501. Inside the tube light image bends at an angle of ______.
A. 100o
B. 90o
C. 20o
D. None
502. Image formed by Periscope is?
A. Virtual
B. Upright
C. Both ‘a’ and ‘b’
D. None of these
503. Periscopes are used in?
A. Submarines
B. Battle tanks
C. Both ‘a’ and ‘b’
D. None
504. We can see moon, stars and planets with the help of?
A. Periscope
B. Telescope
C. Mirror
D. None of these
505. In reflecting Telescope, ________ mirrors are used.
A. Concave
B. Palne
C. Both ‘a’ and ‘b’
D. None of these
506. A reflecting mirror is used at the ________ of microscope.
A. Base
B. Top
C. Side
D. None
507. When two mirrors placed inclined to each other, multiple images are formed, the phenomena is called?
A. Diffused reflection
B. Multiple reflection
C. None of these
508. Kaleidoscope works on the principle of?
A. Diffused reflection
B. Multiple reflection
C. Both ‘a’ and ‘b’
D. None
509. Kaleidoscope is an optical ____ instrument.
A. Toy
B. Military
C. None
510. A scientist from Scotland _______ in 1851 invented Kaleidoscope.
A. David Brewster
B. Einstein
C. Newton
D. None
511. Kaleidoscope contains two or more rectangular ______ mirrors.
A. Concave
B. Plane
C. None
512. The following objects are placed inside kaleidoscope
A. Beads
B. Transparent glass
C. Both ‘a’ and ‘b’
D. None
513. Multiple images inside Kaleidoscope can be seen through a _____ hole.
A. Small
B. Large
C. None of these
514. The number of images in Kaleidoscope depends upon the _____ between the two mirrors.
A. Distance
B. Angles
C. Size
D. None
515. If the angle is 120o, the number of images would be?
A. 3
B. 4
C. 2
D. None
516. If the angle is 90o, the number of images would be?
A. 2
B. 3
C. 4
D. 5
517. If the angle is 60o, then ______ images are formed.
A. 5
B. 4
C. 6
D. 10
518. Types of mirror are?
A. Flat
B. Curved
C. Both ‘a’ and ‘b’
519. Plane mirror is used in?
A. Periscope
B. Telescope
C. Microscope
D. All of these
520. ______ mirror is part of hollow sphere.
A. Curved
B. Plane
C. None