# If the length of a simple pendulum is reduced to half and mass is doubled then the time period of simple is

1. Remains unchanged
2. Halved
3. Doubled
4. Decreased by a factor of $\sqrt{2}$

1. cylindrical
2. spherical
3. planar
4. bipolar

1. cylindrical
2. spherical
3. planar
4. bipolar

# What is the location of the first maxima for 6000 Å light beam?

1. incident on two slits 0.15 mm apart with the screen at 1.5 m is:
1. 3 mm
2. 6 mm
3. 12 mm
4. 24 mm